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/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
2011,2012,2013 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 <http://www.gnu.org/licenses/>.
*/
/**
* @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_ */
/** @} */
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