Mbed OS Reference | fvp_emac.h Source File

 /* mbed Microcontroller Library
  * Copyright (c) 2018 ARM Limited
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 
 #ifndef FVP_EMAC_H_
 #define FVP_EMAC_H_
 
 #include "EMAC.h"
 #include "mbed.h"
 #include "rtos/Mutex.h"
 #include "lan91c111.h"
 
 
 #define FVP_HWADDR_SIZE           (6)
 #define FVP_ETH_MAX_FLEN          (1522) // recommended size for a VLAN frame
 #define FVP_ETH_IF_NAME           "ARM0"
 
 class fvp_EMAC : public EMAC {
 public:
     fvp_EMAC();
 
     static fvp_EMAC &get_instance();
 
     /**
      * Return maximum transmission unit
      *
      * @return     MTU in bytes
      */
     virtual uint32_t get_mtu_size() const;
 
     /**
      * Gets memory buffer alignment preference
      *
      * Gets preferred memory buffer alignment of the Emac device. IP stack may or may not
      * align link out memory buffer chains using the alignment.
      *
      * @return         Memory alignment requirement in bytes
      */
     virtual uint32_t get_align_preference() const;
 
     /**
      * Return interface name
      *
      * @param name Pointer to where the name should be written
      * @param size Maximum number of character to copy
      */
     virtual void get_ifname(char *name, uint8_t size) const;
 
     /**
      * Returns size of the underlying interface HW address size.
      *
      * @return     HW address size in bytes
      */
     virtual uint8_t get_hwaddr_size() const;
 
     /**
      * Return interface-supplied HW address
      *
      * Copies HW address to provided memory, @param addr has to be of correct size see @a get_hwaddr_size
      *
      * HW address need not be provided if this interface does not have its own HW
      * address configuration; stack will choose address from central system
      * configuration if the function returns false and does not write to addr.
      *
      * @param addr HW address for underlying interface
      * @return     true if HW address is available
      */
     virtual bool get_hwaddr(uint8_t *addr) const;
 
     /**
      * Set HW address for interface
      *
      * Provided address has to be of correct size, see @a get_hwaddr_size
      *
      * Called to set the MAC address to actually use - if @a get_hwaddr is provided
      * the stack would normally use that, but it could be overridden, eg for test
      * purposes.
      *
      * @param addr Address to be set
      */
     virtual void set_hwaddr(const uint8_t *addr);
 
     /**
      * Sends the packet over the link
      *
      * That can not be called from an interrupt context.
      *
      * @param buf  Packet to be send
      * @return     True if the packet was send successfully, False otherwise
      */
     virtual bool link_out(emac_mem_buf_t *buf);
 
     /**
      * Initializes the HW
      *
      * @return True on success, False in case of an error.
      */
     virtual bool power_up();
 
     /**
      * Deinitializes the HW
      *
      */
     virtual void power_down();
 
     /**
      * Sets a callback that needs to be called for packets received for that interface
      *
      * @param input_cb Function to be register as a callback
      */
     virtual void set_link_input_cb(emac_link_input_cb_t input_cb);
 
     /**
      * Sets a callback that needs to be called on link status changes for given interface
      *
      * @param state_cb Function to be register as a callback
      */
     virtual void set_link_state_cb(emac_link_state_change_cb_t state_cb);
 
     /** Add device to a multicast group
      *
      * @param address  A multicast group hardware address
      */
     virtual void add_multicast_group(const uint8_t *address);
 
     /** Remove device from a multicast group
      *
      * @param address  A multicast group hardware address
      */
     virtual void remove_multicast_group(const uint8_t *address);
 
     /** Request reception of all multicast packets
      *
      * @param all True to receive all multicasts
      *            False to receive only multicasts addressed to specified groups
      */
     virtual void set_all_multicast(bool all);
 
     /** Sets memory manager that is used to handle memory buffers
      *
      * @param mem_mngr Pointer to memory manager
      */
     virtual void set_memory_manager(EMACMemoryManager &mem_mngr);
 
 private:
     bool low_level_init_successful();
     void rx_isr();
     void tx_isr();
     void packet_rx();
     static void thread_function(void *pvParameters);
     void phy_task();
     static void ethernet_callback(lan91_event_t event, void *param);
 
     Thread _thread;        /* Processing thread */
     rtos::Mutex _TXLockMutex;    /* TX critical section mutex */
 
     emac_link_input_cb_t _emac_link_input_cb;        /* Callback for incoming data */
     emac_link_state_change_cb_t _emac_link_state_cb; /* Link state change callback */
 
     EMACMemoryManager *_memory_manager;   /* Memory manager */
 
     int _phy_task_handle;     /* Handle for phy task event */
     lan91_phy_status_t _prev_state;
 };
 
 #endif /* FVP_EMAC_H_ */
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