182 lines
5.6 KiB
C
182 lines
5.6 KiB
C
/*
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ChibiOS - Copyright (C) 2006..2016 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 mac_lld.h
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* @brief PLATFORM MAC subsystem low level driver header.
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*
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* @addtogroup MAC
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* @{
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*/
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#ifndef _MAC_LLD_H_
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#define _MAC_LLD_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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* @brief This implementation supports the zero-copy mode API.
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*/
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#define MAC_SUPPORTS_ZERO_COPY TRUE
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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 PLATFORM configuration options
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* @{
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*/
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/**
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* @brief MAC driver enable switch.
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* @details If set to @p TRUE the support for MAC1 is included.
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* @note The default is @p FALSE.
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*/
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#if !defined(PLATFORM_MAC_USE_MAC1) || defined(__DOXYGEN__)
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#define PLATFORM_MAC_USE_MAC1 FALSE
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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 configuration structure.
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*/
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typedef struct {
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/**
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* @brief MAC address.
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*/
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uint8_t *mac_address;
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/* End of the mandatory fields.*/
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} MACConfig;
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/**
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* @brief Structure representing a MAC driver.
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*/
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struct MACDriver {
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/**
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* @brief Driver state.
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*/
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macstate_t state;
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/**
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* @brief Current configuration data.
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*/
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const MACConfig *config;
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/**
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* @brief Transmit semaphore.
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*/
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threads_queue_t tdqueue;
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/**
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* @brief Receive semaphore.
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*/
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threads_queue_t rdqueue;
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#if (MAC_USE_EVENTS == TRUE) || defined(__DOXYGEN__)
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/**
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* @brief Receive event.
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*/
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event_source_t rdevent;
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#endif
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/* End of the mandatory fields.*/
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};
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/**
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* @brief Structure representing a transmit descriptor.
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*/
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typedef struct {
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/**
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* @brief Current write offset.
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*/
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size_t offset;
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/**
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* @brief Available space size.
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*/
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size_t size;
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/* End of the mandatory fields.*/
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} MACTransmitDescriptor;
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/**
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* @brief Structure representing a receive descriptor.
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*/
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typedef struct {
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/**
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* @brief Current read offset.
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*/
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size_t offset;
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/**
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* @brief Available data size.
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*/
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size_t size;
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/* End of the mandatory fields.*/
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} MACReceiveDescriptor;
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/*===========================================================================*/
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/* Driver macros. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* External declarations. */
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/*===========================================================================*/
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#if (PLATFORM_MAC_USE_MAC1 == TRUE) && !defined(__DOXYGEN__)
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extern MACDriver ETHD1;
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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void mac_lld_init(void);
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void mac_lld_start(MACDriver *macp);
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void mac_lld_stop(MACDriver *macp);
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msg_t mac_lld_get_transmit_descriptor(MACDriver *macp,
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MACTransmitDescriptor *tdp);
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void mac_lld_release_transmit_descriptor(MACTransmitDescriptor *tdp);
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msg_t mac_lld_get_receive_descriptor(MACDriver *macp,
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MACReceiveDescriptor *rdp);
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void mac_lld_release_receive_descriptor(MACReceiveDescriptor *rdp);
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bool mac_lld_poll_link_status(MACDriver *macp);
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size_t mac_lld_write_transmit_descriptor(MACTransmitDescriptor *tdp,
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uint8_t *buf,
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size_t size);
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size_t mac_lld_read_receive_descriptor(MACReceiveDescriptor *rdp,
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uint8_t *buf,
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size_t size);
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#if MAC_USE_ZERO_COPY == TRUE
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uint8_t *mac_lld_get_next_transmit_buffer(MACTransmitDescriptor *tdp,
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size_t size,
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size_t *sizep);
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const uint8_t *mac_lld_get_next_receive_buffer(MACReceiveDescriptor *rdp,
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size_t *sizep);
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#endif
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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 /* _MAC_LLD_H_ */
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/** @} */
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