193 lines
7.2 KiB
C
193 lines
7.2 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006-2007 Giovanni Di Sirio.
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This file is part of ChibiOS/RT.
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ChibiOS/RT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/RT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file AT91SAM7/mac_lld.h
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* @brief AT91SAM7 low level MAC driver header
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* @addtogroup AT91SAM7_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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/*===========================================================================*/
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/* Driver pre-compile time settings. */
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/*===========================================================================*/
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/**
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* @brief Number of available transmit buffers.
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*/
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#if !defined(MAC_TRANSMIT_BUFFERS) || defined(__DOXYGEN__)
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#define MAC_TRANSMIT_BUFFERS 2
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#endif
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/**
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* @brief Number of available receive buffers.
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*/
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#if !defined(MAC_RECEIVE_BUFFERS) || defined(__DOXYGEN__)
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#define MAC_RECEIVE_BUFFERS 2
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#endif
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/**
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* @brief Maximum supported frame size.
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*/
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#if !defined(MAC_BUFFERS_SIZE) || defined(__DOXYGEN__)
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#define MAC_BUFFERS_SIZE 1518
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#endif
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/*===========================================================================*/
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/* EMAC specific settings. */
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/*===========================================================================*/
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/**
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* @brief Interrupt priority level for the EMAC device.
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*/
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#if !defined(EMAC_INTERRUPT_PRIORITY) || defined(__DOXYGEN__)
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#define EMAC_INTERRUPT_PRIORITY (AT91C_AIC_PRIOR_HIGHEST - 3)
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#endif
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/*===========================================================================*/
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/* EMAC specific constants. */
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/*===========================================================================*/
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#define EMAC_RECEIVE_BUFFERS_SIZE 128 /* Do not modify */
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#define EMAC_TRANSMIT_BUFFERS_SIZE MAC_BUFFERS_SIZE
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#define EMAC_RECEIVE_DESCRIPTORS \
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(((((MAC_BUFFERS_SIZE - 1) | (EMAC_RECEIVE_BUFFERS_SIZE - 1)) + 1) \
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/ EMAC_RECEIVE_BUFFERS_SIZE) * MAC_RECEIVE_BUFFERS)
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#define EMAC_TRANSMIT_DESCRIPTORS MAC_TRANSMIT_BUFFERS
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#define W1_R_OWNERSHIP 0x00000001
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#define W1_R_WRAP 0x00000002
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#define W1_R_ADDRESS_MASK 0xFFFFFFFC
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#define W2_R_LENGTH_MASK 0x00000FFF
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#define W2_R_FRAME_START 0x00004000
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#define W2_R_FRAME_END 0x00008000
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#define W2_R_CFI 0x00010000
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#define W2_R_VLAN_PRIO_MASK 0x000E0000
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#define W2_R_PRIO_TAG_DETECTED 0x00100000
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#define W2_R_VLAN_TAG_DETECTED 0x00200000
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#define W2_R_TYPE_ID_MATCH 0x00400000
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#define W2_R_ADDR4_MATCH 0x00800000
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#define W2_R_ADDR3_MATCH 0x01000000
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#define W2_R_ADDR2_MATCH 0x02000000
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#define W2_R_ADDR1_MATCH 0x04000000
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#define W2_R_RFU1 0x08000000
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#define W2_R_ADDR_EXT_MATCH 0x10000000
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#define W2_R_UNICAST_MATCH 0x20000000
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#define W2_R_MULTICAST_MATCH 0x40000000
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#define W2_R_BROADCAST_DETECTED 0x80000000
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#define W1_T_ADDRESS_MASK 0xFFFFFFFF
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#define W2_T_LENGTH_MASK 0x000007FF
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#define W2_T_LOCKED 0x00000800 /* Not an EMAC flag, used by the driver */
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#define W2_T_RFU1 0x00003000
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#define W2_T_LAST_BUFFER 0x00008000
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#define W2_T_NO_CRC 0x00010000
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#define W2_T_RFU2 0x07FE0000
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#define W2_T_BUFFERS_EXHAUSTED 0x08000000
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#define W2_T_TRANSMIT_UNDERRUN 0x10000000
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#define W2_T_RETRY_LIMIT_EXC 0x20000000
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#define W2_T_WRAP 0x40000000
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#define W2_T_USED 0x80000000
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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 Structure representing a buffer physical descriptor.
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* @note It represents both descriptor types.
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*/
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typedef struct {
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uint32_t w1;
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uint32_t w2;
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} EMACDescriptor;
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/**
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* @brief Structure representing a MAC driver.
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*/
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typedef struct {
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Semaphore md_tdsem; /**< Transmit semaphore. */
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Semaphore md_rdsem; /**< Receive semaphore. */
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#if CH_USE_EVENTS
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EventSource md_rdevent; /**< Receive event source. */
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#endif
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/* End of the mandatory fields.*/
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} MACDriver;
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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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size_t td_offset; /**< Current write offset. */
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size_t td_size; /**< Available space size. */
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/* End of the mandatory fields.*/
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EMACDescriptor *td_physdesc; /**< Pointer to the physical
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descriptor. */
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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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size_t rd_offset; /**< Current read offset. */
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size_t rd_size; /**< Available data size. */
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/* End of the mandatory fields.*/
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EMACDescriptor *rd_physdesc; /**< Pointer to the first descriptor
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of the buffers chain. */
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} MACReceiveDescriptor;
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/*===========================================================================*/
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/* External declarations. */
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/*===========================================================================*/
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/** @cond never*/
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extern MACDriver ETH1;
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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_set_address(MACDriver *macp, const uint8_t *p);
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msg_t max_lld_get_transmit_descriptor(MACDriver *macp,
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MACTransmitDescriptor *tdp);
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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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void mac_lld_release_transmit_descriptor(MACTransmitDescriptor *tdp);
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msg_t max_lld_get_receive_descriptor(MACDriver *macp,
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MACReceiveDescriptor *rdp);
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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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void mac_lld_release_receive_descriptor(MACReceiveDescriptor *rdp);
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bool_t mac_lld_poll_link_status(MACDriver *macp);
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#ifdef __cplusplus
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}
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#endif
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/** @endcond*/
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#endif /* _MAC_LLD_H_ */
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/** @} */
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