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lpc546xx_emac.h
1 /* Copyright (c) 2017 ARM Limited
2  * SPDX-License-Identifier: Apache-2.0
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef LPC546XX_EMAC_H_
18 #define LPC546XX_EMAC_H_
19 
20 #include "EMAC.h"
21 #include "rtos/Semaphore.h"
22 #include "rtos/Mutex.h"
23 
24 class LPC546XX_EMAC : public EMAC {
25 public:
26  LPC546XX_EMAC();
27 
28  static LPC546XX_EMAC &get_instance();
29 
30  /**
31  * Return maximum transmission unit
32  *
33  * @return MTU in bytes
34  */
35  virtual uint32_t get_mtu_size() const;
36 
37  /**
38  * Gets memory buffer alignment preference
39  *
40  * Gets preferred memory buffer alignment of the Emac device. IP stack may or may not
41  * align link out memory buffer chains using the alignment.
42  *
43  * @return Memory alignment requirement in bytes
44  */
45  virtual uint32_t get_align_preference() const;
46 
47  /**
48  * Return interface name
49  *
50  * @param name Pointer to where the name should be written
51  * @param size Maximum number of character to copy
52  */
53  virtual void get_ifname(char *name, uint8_t size) const;
54 
55  /**
56  * Returns size of the underlying interface HW address size.
57  *
58  * @return HW address size in bytes
59  */
60  virtual uint8_t get_hwaddr_size() const;
61 
62  /**
63  * Return interface-supplied HW address
64  *
65  * Copies HW address to provided memory, @param addr has to be of correct size see @a get_hwaddr_size
66  *
67  * HW address need not be provided if this interface does not have its own HW
68  * address configuration; stack will choose address from central system
69  * configuration if the function returns false and does not write to addr.
70  *
71  * @param addr HW address for underlying interface
72  * @return true if HW address is available
73  */
74  virtual bool get_hwaddr(uint8_t *addr) const;
75 
76  /**
77  * Set HW address for interface
78  *
79  * Provided address has to be of correct size, see @a get_hwaddr_size
80  *
81  * Called to set the MAC address to actually use - if @a get_hwaddr is provided
82  * the stack would normally use that, but it could be overridden, eg for test
83  * purposes.
84  *
85  * @param addr Address to be set
86  */
87  virtual void set_hwaddr(const uint8_t *addr);
88 
89  /**
90  * Sends the packet over the link
91  *
92  * That can not be called from an interrupt context.
93  *
94  * @param buf Packet to be send
95  * @return True if the packet was send successfully, False otherwise
96  */
97  virtual bool link_out(emac_mem_buf_t *buf);
98 
99  /**
100  * Initializes the HW
101  *
102  * @return True on success, False in case of an error.
103  */
104  virtual bool power_up();
105 
106  /**
107  * Deinitializes the HW
108  *
109  */
110  virtual void power_down();
111 
112  /**
113  * Sets a callback that needs to be called for packets received for that interface
114  *
115  * @param input_cb Function to be register as a callback
116  */
117  virtual void set_link_input_cb(emac_link_input_cb_t input_cb);
118 
119  /**
120  * Sets a callback that needs to be called on link status changes for given interface
121  *
122  * @param state_cb Function to be register as a callback
123  */
124  virtual void set_link_state_cb(emac_link_state_change_cb_t state_cb);
125 
126  /** Add device to a multicast group
127  *
128  * @param address A multicast group hardware address
129  */
130  virtual void add_multicast_group(const uint8_t *address);
131 
132  /** Remove device from a multicast group
133  *
134  * @param address A multicast group hardware address
135  */
136  virtual void remove_multicast_group(const uint8_t *address);
137 
138  /** Request reception of all multicast packets
139  *
140  * @param all True to receive all multicasts
141  * False to receive only multicasts addressed to specified groups
142  */
143  virtual void set_all_multicast(bool all);
144 
145  /** Sets memory manager that is used to handle memory buffers
146  *
147  * @param mem_mngr Pointer to memory manager
148  */
149  virtual void set_memory_manager(EMACMemoryManager &mem_mngr);
150 
151 private:
152  bool low_level_init_successful();
153  void rx_isr();
154  void tx_isr();
155  void packet_rx();
156  void packet_tx();
157  void tx_reclaim();
158  void input();
159  emac_mem_buf_t *low_level_input();
160  static void thread_function(void* pvParameters);
161  void phy_task();
162  static void ethernet_callback(ENET_Type *base, enet_handle_t *handle, enet_event_t event, uint8_t channel, void *param);
163 
164  mbed_rtos_storage_thread_t thread_cb;
165  osThreadId_t thread; /**< Processing thread */
166  rtos::Mutex TXLockMutex;/**< TX critical section mutex */
167  rtos::Semaphore xTXDCountSem; /**< TX free buffer counting semaphore */
168  emac_link_input_cb_t emac_link_input_cb; /**< Callback for incoming data */
169  emac_link_state_change_cb_t emac_link_state_cb; /**< Link state change callback */
170  EMACMemoryManager *memory_manager; /**< Memory manager */
171  int phy_task_handle; /**< Handle for phy task event */
172  struct PHY_STATE {
173  int connected;
174  phy_speed_t speed;
175  phy_duplex_t duplex;
176  };
177  PHY_STATE prev_state;
178  uint8_t hwaddr[LPC546XX_HWADDR_SIZE];
179 };
180 
181 #endif /* LPC546XX_EMAC_H_ */
virtual bool power_up()
Initializes the HW.
The Semaphore class is used to manage and protect access to a set of shared resources.
Definition: Semaphore.h:50
virtual bool get_hwaddr(uint8_t *addr) const
Return interface-supplied HW address.
virtual void set_memory_manager(EMACMemoryManager &mem_mngr)
Sets memory manager that is used to handle memory buffers.
virtual uint32_t get_align_preference() const
Gets memory buffer alignment preference.
virtual void get_ifname(char *name, uint8_t size) const
Return interface name.
mbed::Callback< void(emac_mem_buf_t *buf)> emac_link_input_cb_t
Callback to be register with EMAC interface and to be called for received packets.
Definition: EMAC.h:48
The Mutex class is used to synchronize the execution of threads.
Definition: Mutex.h:70
virtual void set_hwaddr(const uint8_t *addr)
Set HW address for interface.
virtual void set_link_state_cb(emac_link_state_change_cb_t state_cb)
Sets a callback that needs to be called on link status changes for given interface.
virtual void add_multicast_group(const uint8_t *address)
Add device to a multicast group.
virtual uint32_t get_mtu_size() const
Return maximum transmission unit.
virtual uint8_t get_hwaddr_size() const
Returns size of the underlying interface HW address size.
virtual void set_all_multicast(bool all)
Request reception of all multicast packets.
virtual bool link_out(emac_mem_buf_t *buf)
Sends the packet over the link.
virtual void set_link_input_cb(emac_link_input_cb_t input_cb)
Sets a callback that needs to be called for packets received for that interface.
This interface should be used to abstract low level access to networking hardware All operations rece...
Definition: EMAC.h:32
virtual void remove_multicast_group(const uint8_t *address)
Remove device from a multicast group.
virtual void power_down()
Deinitializes the HW.
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