Mbed OS Reference | kinetis_emac.h Source File

 /* Copyright (c) 2017 ARM Limited
  * SPDX-License-Identifier: Apache-2.0
  *
  * 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 KINETIS_EMAC_H_
 #define KINETIS_EMAC_H_
 
 #include "EMAC.h"
 #include "rtos/Semaphore.h"
 #include "rtos/Mutex.h"
 
 class Kinetis_EMAC : public EMAC {
 public:
     Kinetis_EMAC();
 
     static Kinetis_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();
     void packet_tx();
     void tx_reclaim();
     void input(int idx);
     emac_mem_buf_t *low_level_input(int idx);
     static void thread_function(void* pvParameters);
     void phy_task();
     static void ethernet_callback(ENET_Type *base, enet_handle_t *handle, enet_event_t event, void *param);
 
     mbed_rtos_storage_thread_t thread_cb;
     osThreadId_t thread; /**< Processing thread */
     rtos::Mutex TXLockMutex;/**< TX critical section mutex */
     rtos::Semaphore xTXDCountSem; /**< TX free buffer counting semaphore */
     uint8_t tx_consume_index, tx_produce_index; /**< TX buffers ring */
     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 */
     struct PHY_STATE {
         int connected;
         phy_speed_t speed;
         phy_duplex_t duplex;
     };
     PHY_STATE prev_state;
     uint8_t hwaddr[KINETIS_HWADDR_SIZE];
 };
 
 #endif /* KINETIS_EMAC_H_ */
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