/* ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010, 2011,2012 Giovanni Di Sirio. This file is part of ChibiOS/RT. ChibiOS/RT is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. ChibiOS/RT is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . */ /** * @file AT91SAM7/mac_lld.h * @brief AT91SAM7 low level MAC driver header. * * @addtogroup MAC * @{ */ #ifndef _MAC_LLD_H_ #define _MAC_LLD_H_ #if HAL_USE_MAC || defined(__DOXYGEN__) /*===========================================================================*/ /* Driver constants. */ /*===========================================================================*/ /** * @brief This implementation does not support the zero-copy mode API. */ #define MAC_SUPPORTS_ZERO_COPY FALSE #define EMAC_RECEIVE_BUFFERS_SIZE 128 /* Do not modify */ #define EMAC_TRANSMIT_BUFFERS_SIZE MAC_BUFFERS_SIZE #define EMAC_RECEIVE_DESCRIPTORS \ (((((MAC_BUFFERS_SIZE - 1) | (EMAC_RECEIVE_BUFFERS_SIZE - 1)) + 1) \ / EMAC_RECEIVE_BUFFERS_SIZE) * MAC_RECEIVE_BUFFERS) #define EMAC_TRANSMIT_DESCRIPTORS MAC_TRANSMIT_BUFFERS #define W1_R_OWNERSHIP 0x00000001 #define W1_R_WRAP 0x00000002 #define W1_R_ADDRESS_MASK 0xFFFFFFFC #define W2_R_LENGTH_MASK 0x00000FFF #define W2_R_FRAME_START 0x00004000 #define W2_R_FRAME_END 0x00008000 #define W2_R_CFI 0x00010000 #define W2_R_VLAN_PRIO_MASK 0x000E0000 #define W2_R_PRIO_TAG_DETECTED 0x00100000 #define W2_R_VLAN_TAG_DETECTED 0x00200000 #define W2_R_TYPE_ID_MATCH 0x00400000 #define W2_R_ADDR4_MATCH 0x00800000 #define W2_R_ADDR3_MATCH 0x01000000 #define W2_R_ADDR2_MATCH 0x02000000 #define W2_R_ADDR1_MATCH 0x04000000 #define W2_R_RFU1 0x08000000 #define W2_R_ADDR_EXT_MATCH 0x10000000 #define W2_R_UNICAST_MATCH 0x20000000 #define W2_R_MULTICAST_MATCH 0x40000000 #define W2_R_BROADCAST_DETECTED 0x80000000 #define W1_T_ADDRESS_MASK 0xFFFFFFFF #define W2_T_LENGTH_MASK 0x000007FF #define W2_T_LOCKED 0x00000800 /* Not an EMAC flag. */ #define W2_T_RFU1 0x00003000 #define W2_T_LAST_BUFFER 0x00008000 #define W2_T_NO_CRC 0x00010000 #define W2_T_RFU2 0x07FE0000 #define W2_T_BUFFERS_EXHAUSTED 0x08000000 #define W2_T_TRANSMIT_UNDERRUN 0x10000000 #define W2_T_RETRY_LIMIT_EXC 0x20000000 #define W2_T_WRAP 0x40000000 #define W2_T_USED 0x80000000 /*===========================================================================*/ /* Driver pre-compile time settings. */ /*===========================================================================*/ /** * @brief Number of available transmit buffers. */ #if !defined(MAC_TRANSMIT_BUFFERS) || defined(__DOXYGEN__) #define MAC_TRANSMIT_BUFFERS 2 #endif /** * @brief Number of available receive buffers. */ #if !defined(MAC_RECEIVE_BUFFERS) || defined(__DOXYGEN__) #define MAC_RECEIVE_BUFFERS 2 #endif /** * @brief Maximum supported frame size. */ #if !defined(MAC_BUFFERS_SIZE) || defined(__DOXYGEN__) #define MAC_BUFFERS_SIZE 1518 #endif /** * @brief Interrupt priority level for the EMAC device. */ #if !defined(EMAC_INTERRUPT_PRIORITY) || defined(__DOXYGEN__) #define EMAC_INTERRUPT_PRIORITY (AT91C_AIC_PRIOR_HIGHEST - 3) #endif /*===========================================================================*/ /* Derived constants and error checks. */ /*===========================================================================*/ /*===========================================================================*/ /* Driver data structures and types. */ /*===========================================================================*/ /** * @brief Structure representing a buffer physical descriptor. * @note It represents both descriptor types. */ typedef struct { uint32_t w1; uint32_t w2; } EMACDescriptor; /** * @brief Driver configuration structure. */ typedef struct { /** * @brief MAC address. */ uint8_t *mac_address; /* End of the mandatory fields.*/ } MACConfig; /** * @brief Structure representing a MAC driver. */ struct MACDriver { /** * @brief Driver state. */ macstate_t state; /** * @brief Current configuration data. */ const MACConfig *config; /** * @brief Transmit semaphore. */ Semaphore tdsem; /** * @brief Receive semaphore. */ Semaphore rdsem; #if MAC_USE_EVENTS || defined(__DOXYGEN__) /** * @brief Receive event. */ EventSource rdevent; #endif /* End of the mandatory fields.*/ /** * @brief Link status flag. */ bool_t link_up; }; /** * @brief Structure representing a transmit descriptor. */ typedef struct { /** * @brief Current write offset. */ size_t offset; /** * @brief Available space size. */ size_t size; /* End of the mandatory fields.*/ /** * @brief Pointer to the physical descriptor. */ EMACDescriptor *physdesc; } MACTransmitDescriptor; /** * @brief Structure representing a receive descriptor. */ typedef struct { /** * @brief Current read offset. */ size_t offset; /** * @brief Available data size. */ size_t size; /* End of the mandatory fields.*/ /** * @brief Pointer to the first descriptor of the buffers chain. */ EMACDescriptor *physdesc; } MACReceiveDescriptor; /*===========================================================================*/ /* Driver macros. */ /*===========================================================================*/ /*===========================================================================*/ /* External declarations. */ /*===========================================================================*/ #if !defined(__DOXYGEN__) extern MACDriver ETHD1; #endif #ifdef __cplusplus extern "C" { #endif void mac_lld_init(void); void mac_lld_start(MACDriver *macp); void mac_lld_stop(MACDriver *macp); msg_t mac_lld_get_transmit_descriptor(MACDriver *macp, MACTransmitDescriptor *tdp); size_t mac_lld_write_transmit_descriptor(MACTransmitDescriptor *tdp, uint8_t *buf, size_t size); void mac_lld_release_transmit_descriptor(MACTransmitDescriptor *tdp); msg_t mac_lld_get_receive_descriptor(MACDriver *macp, MACReceiveDescriptor *rdp); size_t mac_lld_read_receive_descriptor(MACReceiveDescriptor *rdp, uint8_t *buf, size_t size); void mac_lld_release_receive_descriptor(MACReceiveDescriptor *rdp); bool_t mac_lld_poll_link_status(MACDriver *macp); #ifdef __cplusplus } #endif #endif /* HAL_USE_MAC */ #endif /* _MAC_LLD_H_ */ /** @} */