258 lines
9.2 KiB
C
258 lines
9.2 KiB
C
// Copyright 2019 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#pragma once
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "esp_eth_com.h"
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#include "esp_eth_mac.h"
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#include "esp_eth_phy.h"
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/**
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* @brief Handle of Ethernet driver
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*
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*/
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typedef void *esp_eth_handle_t;
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/**
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* @brief Configuration of Ethernet driver
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*
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*/
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typedef struct {
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/**
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* @brief Ethernet MAC object
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*
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*/
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esp_eth_mac_t *mac;
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/**
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* @brief Ethernet PHY object
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*
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*/
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esp_eth_phy_t *phy;
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/**
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* @brief Period time of checking Ethernet link status
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*
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*/
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uint32_t check_link_period_ms;
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/**
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* @brief Input frame buffer to user's stack
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*
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* @param[in] eth_handle: handle of Ethernet driver
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* @param[in] buffer: frame buffer that will get input to upper stack
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* @param[in] length: length of the frame buffer
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*
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* @return
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* - ESP_OK: input frame buffer to upper stack successfully
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* - ESP_FAIL: error occurred when inputting buffer to upper stack
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*
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*/
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esp_err_t (*stack_input)(esp_eth_handle_t eth_handle, uint8_t *buffer, uint32_t length, void *priv);
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/**
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* @brief Callback function invoked when lowlevel initialization is finished
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*
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* @param[in] eth_handle: handle of Ethernet driver
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*
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* @return
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* - ESP_OK: process extra lowlevel initialization successfully
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* - ESP_FAIL: error occurred when processing extra lowlevel initialization
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*/
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esp_err_t (*on_lowlevel_init_done)(esp_eth_handle_t eth_handle);
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/**
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* @brief Callback function invoked when lowlevel deinitialization is finished
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*
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* @param[in] eth_handle: handle of Ethernet driver
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*
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* @return
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* - ESP_OK: process extra lowlevel deinitialization successfully
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* - ESP_FAIL: error occurred when processing extra lowlevel deinitialization
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*/
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esp_err_t (*on_lowlevel_deinit_done)(esp_eth_handle_t eth_handle);
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} esp_eth_config_t;
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/**
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* @brief Default configuration for Ethernet driver
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*
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*/
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#define ETH_DEFAULT_CONFIG(emac, ephy) \
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{ \
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.mac = emac, \
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.phy = ephy, \
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.check_link_period_ms = 2000, \
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.stack_input = NULL, \
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.on_lowlevel_init_done = NULL, \
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.on_lowlevel_deinit_done = NULL, \
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}
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/**
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* @brief Install Ethernet driver
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*
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* @param[in] config: configuration of the Ethernet driver
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* @param[out] out_hdl: handle of Ethernet driver
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*
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* @return
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* - ESP_OK: install esp_eth driver successfully
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* - ESP_ERR_INVALID_ARG: install esp_eth driver failed because of some invalid argument
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* - ESP_ERR_NO_MEM: install esp_eth driver failed because there's no memory for driver
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* - ESP_FAIL: install esp_eth driver failed because some other error occurred
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*/
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esp_err_t esp_eth_driver_install(const esp_eth_config_t *config, esp_eth_handle_t *out_hdl);
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/**
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* @brief Uninstall Ethernet driver
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* @note It's not recommended to uninstall Ethernet driver unless it won't get used any more in application code.
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* To uninstall Ethernet driver, you have to make sure, all references to the driver are released.
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* Ethernet driver can only be uninstalled successfully when reference counter equals to one.
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*
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* @param[in] hdl: handle of Ethernet driver
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*
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* @return
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* - ESP_OK: uninstall esp_eth driver successfully
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* - ESP_ERR_INVALID_ARG: uninstall esp_eth driver failed because of some invalid argument
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* - ESP_ERR_INVALID_STATE: uninstall esp_eth driver failed because it has more than one reference
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* - ESP_FAIL: uninstall esp_eth driver failed because some other error occurred
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*/
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esp_err_t esp_eth_driver_uninstall(esp_eth_handle_t hdl);
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/**
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* @brief Start Ethernet driver **ONLY** in standalone mode (i.e. without TCP/IP stack)
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*
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* @note This API will start driver state machine and internal software timer (for checking link status).
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*
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* @param[in] hdl handle of Ethernet driver
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*
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* @return
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* - ESP_OK: start esp_eth driver successfully
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* - ESP_ERR_INVALID_ARG: start esp_eth driver failed because of some invalid argument
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* - ESP_ERR_INVALID_STATE: start esp_eth driver failed because driver has started already
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* - ESP_FAIL: start esp_eth driver failed because some other error occurred
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*/
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esp_err_t esp_eth_start(esp_eth_handle_t hdl);
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/**
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* @brief Stop Ethernet driver
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*
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* @note This function does the oppsite operation of `esp_eth_start`.
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*
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* @param[in] hdl handle of Ethernet driver
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* @return
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* - ESP_OK: stop esp_eth driver successfully
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* - ESP_ERR_INVALID_ARG: stop esp_eth driver failed because of some invalid argument
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* - ESP_ERR_INVALID_STATE: stop esp_eth driver failed because driver has not started yet
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* - ESP_FAIL: stop esp_eth driver failed because some other error occurred
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*/
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esp_err_t esp_eth_stop(esp_eth_handle_t hdl);
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/**
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* @brief Update Ethernet data input path (i.e. specify where to pass the input buffer)
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*
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* @note After install driver, Ethernet still don't know where to deliver the input buffer.
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* In fact, this API registers a callback function which get invoked when Ethernet received new packets.
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*
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* @param[in] hdl handle of Ethernet driver
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* @param[in] stack_input function pointer, which does the actual process on incoming packets
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* @param[in] priv private resource, which gets passed to `stack_input` callback without any modification
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* @return
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* - ESP_OK: update input path successfully
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* - ESP_ERR_INVALID_ARG: update input path failed because of some invalid argument
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* - ESP_FAIL: update input path failed because some other error occurred
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*/
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esp_err_t esp_eth_update_input_path(
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esp_eth_handle_t hdl,
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esp_err_t (*stack_input)(esp_eth_handle_t hdl, uint8_t *buffer, uint32_t length, void *priv),
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void *priv);
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/**
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* @brief General Transmit
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*
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* @param[in] hdl: handle of Ethernet driver
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* @param[in] buf: buffer of the packet to transfer
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* @param[in] length: length of the buffer to transfer
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*
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* @return
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* - ESP_OK: transmit frame buffer successfully
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* - ESP_ERR_INVALID_ARG: transmit frame buffer failed because of some invalid argument
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* - ESP_FAIL: transmit frame buffer failed because some other error occurred
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*/
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esp_err_t esp_eth_transmit(esp_eth_handle_t hdl, void *buf, uint32_t length);
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/**
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* @brief General Receive
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*
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* @param[in] hdl: handle of Ethernet driver
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* @param[out] buf: buffer to preserve the received packet
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* @param[out] length: length of the received packet
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*
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* @note Before this function got invoked, the value of "length" should set by user, equals the size of buffer.
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* After the function returned, the value of "length" means the real length of received data.
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*
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* @return
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* - ESP_OK: receive frame buffer successfully
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* - ESP_ERR_INVALID_ARG: receive frame buffer failed because of some invalid argument
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* - ESP_ERR_INVALID_SIZE: input buffer size is not enough to hold the incoming data.
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* in this case, value of returned "length" indicates the real size of incoming data.
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* - ESP_FAIL: receive frame buffer failed because some other error occurred
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*/
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esp_err_t esp_eth_receive(esp_eth_handle_t hdl, uint8_t *buf, uint32_t *length);
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/**
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* @brief Misc IO function of Etherent driver
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*
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* @param[in] hdl: handle of Ethernet driver
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* @param[in] cmd: IO control command
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* @param[in] data: specificed data for command
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*
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* @return
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* - ESP_OK: process io command successfully
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* - ESP_ERR_INVALID_ARG: process io command failed because of some invalid argument
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* - ESP_FAIL: process io command failed because some other error occurred
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*/
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esp_err_t esp_eth_ioctl(esp_eth_handle_t hdl, esp_eth_io_cmd_t cmd, void *data);
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/**
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* @brief Increase Ethernet driver reference
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* @note Ethernet driver handle can be obtained by os timer, netif, etc.
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* It's dangerous when thread A is using Ethernet but thread B uninstall the driver.
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* Using reference counter can prevent such risk, but care should be taken, when you obtain Ethernet driver,
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* this API must be invoked so that the driver won't be uninstalled during your using time.
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*
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*
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* @param[in] hdl: handle of Ethernet driver
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* @return
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* - ESP_OK: increase reference successfully
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* - ESP_ERR_INVALID_ARG: increase reference failed because of some invalid argument
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*/
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esp_err_t esp_eth_increase_reference(esp_eth_handle_t hdl);
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/**
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* @brief Decrease Ethernet driver reference
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*
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* @param[in] hdl: handle of Ethernet driver
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* @return
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* - ESP_OK: increase reference successfully
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* - ESP_ERR_INVALID_ARG: increase reference failed because of some invalid argument
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*/
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esp_err_t esp_eth_decrease_reference(esp_eth_handle_t hdl);
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#ifdef __cplusplus
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}
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#endif
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