Diff: features/netsocket/EMAC.h

Revision:

0:5b88d5760320

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/features/netsocket/EMAC.h	Tue Dec 17 23:23:45 2019 +0000
@@ -0,0 +1,187 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2016 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 EMAC_H
+#define EMAC_H
+
+#include <stdbool.h>
+#include "Callback.h"
+#include "EMACMemoryManager.h"
+
+// Nuvoton platform headers define EMAC - avoid the collision
+#undef EMAC
+
+/**
+ * This interface should be used to abstract low level access to networking hardware
+ * All operations receive a `void *` hardware pointer which an EMAC device provides when
+ * it is registered with a stack.
+ */
+class EMAC {
+public:
+
+    /** Return the default on-board EMAC
+     *
+     * Returns the default on-board EMAC - this will be target-specific, and
+     * may not be available on all targets.
+     */
+    static EMAC &get_default_instance();
+
+    /**
+     * Callback to be register with EMAC interface and to be called for received packets
+     *
+     * @param buf  Received data
+     */
+    //typedef void (*emac_link_input_fn)(void *data, emac_mem_buf_t *buf);
+    typedef 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 link status changes
+     *
+     * @param  up   Link status
+     */
+    //typedef void (*emac_link_state_change_fn)(void *data, bool up);
+    typedef mbed::Callback<void (bool up)> emac_link_state_change_cb_t;
+
+    /**
+     * Return maximum transmission unit
+     *
+     * @return     MTU in bytes
+     */
+    virtual uint32_t get_mtu_size() const = 0;
+
+    /**
+     * 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 = 0;
+
+    /**
+     * 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 = 0;
+
+    /**
+     * Returns size of the underlying interface HW address size.
+     *
+     * @return     HW address size in bytes
+     */
+    virtual uint8_t get_hwaddr_size() const = 0;
+
+    /**
+     * 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 = 0;
+
+    /**
+     * 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, for example for test
+     * purposes.
+     *
+     * @param addr Address to be set
+     */
+    virtual void set_hwaddr(const uint8_t *addr) = 0;
+
+    /**
+     * 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) = 0;
+
+    /**
+     * Initializes the HW
+     *
+     * @return True on success, False in case of an error.
+     */
+    virtual bool power_up() = 0;
+
+    /**
+     * Deinitializes the HW
+     *
+     */
+    virtual void power_down() = 0;
+
+    /**
+     * 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) = 0;
+
+    /**
+     * 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) = 0;
+
+    /** Add device to a multicast group
+     *
+     * @param address  A multicast group hardware address
+     */
+    virtual void add_multicast_group(const uint8_t *address) = 0;
+
+    /** Remove device from a multicast group
+     *
+     * @param address  A multicast group hardware address
+     */
+    virtual void remove_multicast_group(const uint8_t *address) = 0;
+
+    /** 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) = 0;
+
+    /** 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) = 0;
+};
+
+
+/** These need to be defined by targets wishing to provide an Ethernet driver using EMAC interface. It will
+ *  be used by the EMACInterface class's default constructor to initialize the networking subsystem.
+ */
+//extern const emac_interface_ops_t mbed_emac_eth_ops_default;
+//extern void *mbed_emac_eth_hw_default;
+
+#endif  /* EMAC_H */