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esp_eth: using esp_timer to check link status

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This commit is contained in:
morris
2021-04-19 15:05:29 +08:00
parent 537617aec7
commit 0733adab5e
2 changed files with 69 additions and 76 deletions
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2
components/esp_eth/CMakeLists.txt
View File

@@ -8,7 +8,7 @@ set(priv_requires)
if(CONFIG_ETH_ENABLED) if(CONFIG_ETH_ENABLED)
set(srcs "src/esp_eth.c" "src/esp_eth_phy.c") set(srcs "src/esp_eth.c" "src/esp_eth_phy.c")
set(include "include") set(include "include")
set(priv_requires "driver" "log") # require "driver" for using some GPIO APIs set(priv_requires "driver" "log" "esp_timer") # require "driver" for using some GPIO APIs
if(NOT CMAKE_BUILD_EARLY_EXPANSION) if(NOT CMAKE_BUILD_EARLY_EXPANSION)
# esp_netif related # esp_netif related

143
components/esp_eth/src/esp_eth.c
View File

@@ -1,4 +1,4 @@
// Copyright 2019 Espressif Systems (Shanghai) PTE LTD // Copyright 2019-2021 Espressif Systems (Shanghai) PTE LTD
// //
// Licensed under the Apache License, Version 2.0 (the "License"); // Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License. // you may not use this file except in compliance with the License.
@@ -11,16 +11,17 @@
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and // See the License for the specific language governing permissions and
// limitations under the License. // limitations under the License.
#include <sys/cdefs.h> #include <sys/cdefs.h>
#include <stdatomic.h> #include <stdatomic.h>
#include "esp_log.h" #include "esp_log.h"
#include "esp_check.h" #include "esp_check.h"
#include "esp_eth.h" #include "esp_eth.h"
#include "esp_event.h" #include "esp_event.h"
#include "esp_heap_caps.h"
#include "esp_timer.h"
#include "freertos/FreeRTOS.h" #include "freertos/FreeRTOS.h"
#include "freertos/task.h" #include "freertos/task.h"
#include "freertos/timers.h"
#include "esp_heap_caps.h"
static const char *TAG = "esp_eth"; static const char *TAG = "esp_eth";
@@ -45,7 +46,8 @@ typedef struct {
esp_eth_mediator_t mediator; esp_eth_mediator_t mediator;
esp_eth_phy_t *phy; esp_eth_phy_t *phy;
esp_eth_mac_t *mac; esp_eth_mac_t *mac;
TimerHandle_t check_link_timer; esp_timer_handle_t check_link_timer;
uint32_t check_link_period_ms;
eth_speed_t speed; eth_speed_t speed;
eth_duplex_t duplex; eth_duplex_t duplex;
eth_link_t link; eth_link_t link;
@@ -97,10 +99,10 @@ static esp_err_t eth_stack_input(esp_eth_mediator_t *eth, uint8_t *buffer, uint3
esp_eth_driver_t *eth_driver = __containerof(eth, esp_eth_driver_t, mediator); esp_eth_driver_t *eth_driver = __containerof(eth, esp_eth_driver_t, mediator);
if (eth_driver->stack_input) { if (eth_driver->stack_input) {
return eth_driver->stack_input((esp_eth_handle_t)eth_driver, buffer, length, eth_driver->priv); return eth_driver->stack_input((esp_eth_handle_t)eth_driver, buffer, length, eth_driver->priv);
} else {
free(buffer);
return ESP_OK;
} }
// No stack input path has been installed, just drop the incoming packets
free(buffer);
return ESP_OK;
} }
static esp_err_t eth_on_state_changed(esp_eth_mediator_t *eth, esp_eth_state_t state, void *args) static esp_err_t eth_on_state_changed(esp_eth_mediator_t *eth, esp_eth_state_t state, void *args)
@@ -155,18 +157,15 @@ static esp_err_t eth_on_state_changed(esp_eth_mediator_t *eth, esp_eth_state_t s
ESP_GOTO_ON_FALSE(false, ESP_ERR_INVALID_ARG, err, TAG, "unknown ethernet state: %d", state); ESP_GOTO_ON_FALSE(false, ESP_ERR_INVALID_ARG, err, TAG, "unknown ethernet state: %d", state);
break; break;
} }
return ESP_OK;
err: err:
return ret; return ret;
} }
static void eth_check_link_timer_cb(TimerHandle_t xTimer) static void eth_check_link_timer_cb(void *args)
{ {
esp_eth_driver_t *eth_driver = (esp_eth_driver_t *)pvTimerGetTimerID(xTimer); esp_eth_driver_t *eth_driver = (esp_eth_driver_t *)args;
esp_eth_phy_t *phy = eth_driver->phy; esp_eth_phy_t *phy = eth_driver->phy;
esp_eth_increase_reference(eth_driver);
phy->get_link(phy); phy->get_link(phy);
esp_eth_decrease_reference(eth_driver);
} }
////////////////////////////////User face APIs//////////////////////////////////////////////// ////////////////////////////////User face APIs////////////////////////////////////////////////
@@ -178,14 +177,23 @@ static void eth_check_link_timer_cb(TimerHandle_t xTimer)
esp_err_t esp_eth_driver_install(const esp_eth_config_t *config, esp_eth_handle_t *out_hdl) esp_err_t esp_eth_driver_install(const esp_eth_config_t *config, esp_eth_handle_t *out_hdl)
{ {
esp_err_t ret = ESP_OK; esp_err_t ret = ESP_OK;
ESP_GOTO_ON_FALSE(config, ESP_ERR_INVALID_ARG, err, TAG, "eth config can't be null"); esp_eth_mac_t *mac = NULL;
ESP_GOTO_ON_FALSE(out_hdl, ESP_ERR_INVALID_ARG, err, TAG, "eth handle can't be null"); esp_eth_phy_t *phy = NULL;
esp_eth_mac_t *mac = config->mac; esp_eth_driver_t *eth_driver = NULL;
esp_eth_phy_t *phy = config->phy; ESP_GOTO_ON_FALSE(config && out_hdl, ESP_ERR_INVALID_ARG, err, TAG, "invalid argument");
mac = config->mac;
phy = config->phy;
ESP_GOTO_ON_FALSE(mac && phy, ESP_ERR_INVALID_ARG, err, TAG, "can't set eth->mac or eth->phy to null"); ESP_GOTO_ON_FALSE(mac && phy, ESP_ERR_INVALID_ARG, err, TAG, "can't set eth->mac or eth->phy to null");
// eth_driver contains an atomic variable, which should not be put in PSRAM // eth_driver contains an atomic variable, which should not be put in PSRAM
esp_eth_driver_t *eth_driver = heap_caps_calloc(1, sizeof(esp_eth_driver_t), MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT); eth_driver = heap_caps_calloc(1, sizeof(esp_eth_driver_t), MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT);
ESP_GOTO_ON_FALSE(eth_driver, ESP_ERR_NO_MEM, err, TAG, "request memory for eth_driver failed"); ESP_GOTO_ON_FALSE(eth_driver, ESP_ERR_NO_MEM, err, TAG, "no mem for eth_driver");
const esp_timer_create_args_t check_link_timer_args = {
.callback = eth_check_link_timer_cb,
.name = "eth_link_timer",
.arg = eth_driver,
.skip_unhandled_events = true
};
ESP_GOTO_ON_ERROR(esp_timer_create(&check_link_timer_args, &eth_driver->check_link_timer), err, TAG, "create link timer failed");
atomic_init(&eth_driver->ref_count, 1); atomic_init(&eth_driver->ref_count, 1);
atomic_init(&eth_driver->fsm, ESP_ETH_FSM_STOP); atomic_init(&eth_driver->fsm, ESP_ETH_FSM_STOP);
eth_driver->mac = mac; eth_driver->mac = mac;
@@ -196,22 +204,24 @@ esp_err_t esp_eth_driver_install(const esp_eth_config_t *config, esp_eth_handle_
eth_driver->stack_input = config->stack_input; eth_driver->stack_input = config->stack_input;
eth_driver->on_lowlevel_init_done = config->on_lowlevel_init_done; eth_driver->on_lowlevel_init_done = config->on_lowlevel_init_done;
eth_driver->on_lowlevel_deinit_done = config->on_lowlevel_deinit_done; eth_driver->on_lowlevel_deinit_done = config->on_lowlevel_deinit_done;
eth_driver->check_link_period_ms = config->check_link_period_ms;
eth_driver->customized_read_phy_reg = config->read_phy_reg; eth_driver->customized_read_phy_reg = config->read_phy_reg;
eth_driver->customized_write_phy_reg = config->write_phy_reg; eth_driver->customized_write_phy_reg = config->write_phy_reg;
eth_driver->mediator.phy_reg_read = eth_phy_reg_read; eth_driver->mediator.phy_reg_read = eth_phy_reg_read;
eth_driver->mediator.phy_reg_write = eth_phy_reg_write; eth_driver->mediator.phy_reg_write = eth_phy_reg_write;
eth_driver->mediator.stack_input = eth_stack_input; eth_driver->mediator.stack_input = eth_stack_input;
eth_driver->mediator.on_state_changed = eth_on_state_changed; eth_driver->mediator.on_state_changed = eth_on_state_changed;
/* some PHY can't output RMII clock if in reset state, so hardware reset PHY chip firstly */ // set mediator for both mac and phy object, so that mac and phy are connected to each other via mediator
mac->set_mediator(mac, &eth_driver->mediator);
phy->set_mediator(phy, &eth_driver->mediator);
// for PHY whose internal PLL has been configured to generate RMII clock, but is put in reset state during power up,
// we need to deasseert the reset GPIO of PHY device first, ensure the RMII is clocked out from PHY
phy->reset_hw(phy); phy->reset_hw(phy);
ESP_GOTO_ON_ERROR(mac->set_mediator(mac, &eth_driver->mediator), err_mediator, TAG, "set mediator for mac failed"); // init MAC first, so that MAC can generate the correct SMI signals
ESP_GOTO_ON_ERROR(phy->set_mediator(phy, &eth_driver->mediator), err_mediator, TAG, "set mediator for phy failed"); ESP_GOTO_ON_ERROR(mac->init(mac), err, TAG, "init mac failed");
ESP_GOTO_ON_ERROR(mac->init(mac), err_init_mac, TAG, "init mac failed"); ESP_GOTO_ON_ERROR(phy->init(phy), err, TAG, "init phy failed");
ESP_GOTO_ON_ERROR(phy->init(phy), err_init_phy, TAG, "init phy failed"); ESP_LOGD(TAG, "new ethernet driver @%p", eth_driver);
eth_driver->check_link_timer = xTimerCreate("eth_link_timer", pdMS_TO_TICKS(config->check_link_period_ms), pdTRUE, *out_hdl = eth_driver;
eth_driver, eth_check_link_timer_cb);
ESP_GOTO_ON_FALSE(eth_driver->check_link_timer, ESP_FAIL, err_create_timer, TAG, "create eth_link_timer failed");
*out_hdl = (esp_eth_handle_t)eth_driver;
// for backward compatible to 4.0, and will get removed in 5.0 // for backward compatible to 4.0, and will get removed in 5.0
#if CONFIG_ESP_NETIF_TCPIP_ADAPTER_COMPATIBLE_LAYER #if CONFIG_ESP_NETIF_TCPIP_ADAPTER_COMPATIBLE_LAYER
@@ -220,14 +230,13 @@ esp_err_t esp_eth_driver_install(const esp_eth_config_t *config, esp_eth_handle_
#endif #endif
return ESP_OK; return ESP_OK;
err_create_timer:
phy->deinit(phy);
err_init_phy:
mac->deinit(mac);
err_init_mac:
err_mediator:
free(eth_driver);
err: err:
if (eth_driver) {
if (eth_driver->check_link_timer) {
esp_timer_delete(eth_driver->check_link_timer);
}
free(eth_driver);
}
return ret; return ret;
} }
@@ -235,28 +244,21 @@ esp_err_t esp_eth_driver_uninstall(esp_eth_handle_t hdl)
{ {
esp_err_t ret = ESP_OK; esp_err_t ret = ESP_OK;
esp_eth_driver_t *eth_driver = (esp_eth_driver_t *)hdl; esp_eth_driver_t *eth_driver = (esp_eth_driver_t *)hdl;
ESP_GOTO_ON_FALSE(eth_driver, ESP_ERR_INVALID_ARG, err, TAG, "ethernet driver handle can't be null"); ESP_GOTO_ON_FALSE(eth_driver, ESP_ERR_INVALID_ARG, err, TAG, "invalid argument");
// check if driver has started // check if driver has stopped
esp_eth_fsm_t expected_fsm = ESP_ETH_FSM_STOP; esp_eth_fsm_t expected_fsm = ESP_ETH_FSM_STOP;
if (!atomic_compare_exchange_strong(&eth_driver->fsm, &expected_fsm, ESP_ETH_FSM_STOP)) { ESP_GOTO_ON_FALSE(atomic_compare_exchange_strong(&eth_driver->fsm, &expected_fsm, ESP_ETH_FSM_STOP),
ESP_LOGW(TAG, "driver not stopped yet"); ESP_ERR_INVALID_STATE, err, TAG, "driver not stopped yet");
ret = ESP_ERR_INVALID_STATE;
goto err;
}
// don't uninstall driver unless there's only one reference // don't uninstall driver unless there's only one reference
int expected_ref_count = 1; int expected_ref_count = 1;
if (!atomic_compare_exchange_strong(&eth_driver->ref_count, &expected_ref_count, 0)) { ESP_GOTO_ON_FALSE(atomic_compare_exchange_strong(&eth_driver->ref_count, &expected_ref_count, 0),
ESP_LOGE(TAG, "%d ethernet reference in use", expected_ref_count); ESP_ERR_INVALID_STATE, err, TAG, "%d ethernet reference in use", expected_ref_count);
ret = ESP_ERR_INVALID_STATE;
goto err;
}
esp_eth_mac_t *mac = eth_driver->mac; esp_eth_mac_t *mac = eth_driver->mac;
esp_eth_phy_t *phy = eth_driver->phy; esp_eth_phy_t *phy = eth_driver->phy;
ESP_GOTO_ON_FALSE(xTimerDelete(eth_driver->check_link_timer, 0) == pdPASS, ESP_FAIL, err, TAG, "delete eth_link_timer failed"); ESP_GOTO_ON_ERROR(esp_timer_delete(eth_driver->check_link_timer), err, TAG, "delete link timer failed");
ESP_GOTO_ON_ERROR(phy->deinit(phy), err, TAG, "deinit phy failed"); ESP_GOTO_ON_ERROR(phy->deinit(phy), err, TAG, "deinit phy failed");
ESP_GOTO_ON_ERROR(mac->deinit(mac), err, TAG, "deinit mac failed"); ESP_GOTO_ON_ERROR(mac->deinit(mac), err, TAG, "deinit mac failed");
free(eth_driver); free(eth_driver);
return ESP_OK;
err: err:
return ret; return ret;
} }
@@ -266,19 +268,17 @@ esp_err_t esp_eth_start(esp_eth_handle_t hdl)
esp_err_t ret = ESP_OK; esp_err_t ret = ESP_OK;
esp_eth_driver_t *eth_driver = (esp_eth_driver_t *)hdl; esp_eth_driver_t *eth_driver = (esp_eth_driver_t *)hdl;
ESP_GOTO_ON_FALSE(eth_driver, ESP_ERR_INVALID_ARG, err, TAG, "ethernet driver handle can't be null"); ESP_GOTO_ON_FALSE(eth_driver, ESP_ERR_INVALID_ARG, err, TAG, "ethernet driver handle can't be null");
// check if driver has started esp_eth_phy_t *phy = eth_driver->phy;
// check if driver has stopped
esp_eth_fsm_t expected_fsm = ESP_ETH_FSM_STOP; esp_eth_fsm_t expected_fsm = ESP_ETH_FSM_STOP;
if (!atomic_compare_exchange_strong(&eth_driver->fsm, &expected_fsm, ESP_ETH_FSM_START)) { ESP_GOTO_ON_FALSE(atomic_compare_exchange_strong(&eth_driver->fsm, &expected_fsm, ESP_ETH_FSM_START),
ESP_LOGW(TAG, "driver started already"); ESP_ERR_INVALID_STATE, err, TAG, "driver started already");
ret = ESP_ERR_INVALID_STATE; // reset PHY device, to put it back to LINK_DOWN state
goto err; ESP_GOTO_ON_ERROR(phy->reset(phy), err, TAG, "reset phy failed");
} ESP_GOTO_ON_ERROR(esp_event_post(ETH_EVENT, ETHERNET_EVENT_START, &eth_driver, sizeof(esp_eth_driver_t *), 0),
ESP_GOTO_ON_ERROR(eth_driver->phy->reset(eth_driver->phy), err, TAG, "reset phy failed"); err, TAG, "send ETHERNET_EVENT_START event failed");
ESP_GOTO_ON_FALSE(xTimerStart(eth_driver->check_link_timer, 0), ESP_FAIL, err, TAG, "start eth_link_timer failed"); ESP_GOTO_ON_ERROR(esp_timer_start_periodic(eth_driver->check_link_timer, eth_driver->check_link_period_ms * 1000),
ESP_GOTO_ON_ERROR(esp_event_post(ETH_EVENT, ETHERNET_EVENT_START, &eth_driver, sizeof(esp_eth_driver_t *), 0), err_event, TAG, "send ETHERNET_EVENT_START event failed"); err, TAG, "start link timer failed");
return ESP_OK;
err_event:
xTimerStop(eth_driver->check_link_timer, 0);
err: err:
return ret; return ret;
} }
@@ -288,18 +288,15 @@ esp_err_t esp_eth_stop(esp_eth_handle_t hdl)
esp_err_t ret = ESP_OK; esp_err_t ret = ESP_OK;
esp_eth_driver_t *eth_driver = (esp_eth_driver_t *)hdl; esp_eth_driver_t *eth_driver = (esp_eth_driver_t *)hdl;
ESP_GOTO_ON_FALSE(eth_driver, ESP_ERR_INVALID_ARG, err, TAG, "ethernet driver handle can't be null"); ESP_GOTO_ON_FALSE(eth_driver, ESP_ERR_INVALID_ARG, err, TAG, "ethernet driver handle can't be null");
esp_eth_mac_t *mac = eth_driver->mac;
// check if driver has started // check if driver has started
esp_eth_fsm_t expected_fsm = ESP_ETH_FSM_START; esp_eth_fsm_t expected_fsm = ESP_ETH_FSM_START;
if (!atomic_compare_exchange_strong(&eth_driver->fsm, &expected_fsm, ESP_ETH_FSM_STOP)) { ESP_GOTO_ON_FALSE(atomic_compare_exchange_strong(&eth_driver->fsm, &expected_fsm, ESP_ETH_FSM_STOP),
ESP_LOGW(TAG, "driver not started yet"); ESP_ERR_INVALID_STATE, err, TAG, "driver not started yet");
ret = ESP_ERR_INVALID_STATE; ESP_GOTO_ON_ERROR(esp_timer_stop(eth_driver->check_link_timer), err, TAG, "stop link timer failed");
goto err;
}
esp_eth_mac_t *mac = eth_driver->mac;
ESP_GOTO_ON_ERROR(mac->stop(mac), err, TAG, "stop mac failed"); ESP_GOTO_ON_ERROR(mac->stop(mac), err, TAG, "stop mac failed");
ESP_GOTO_ON_FALSE(xTimerStop(eth_driver->check_link_timer, 0), ESP_FAIL, err, TAG, "stop eth_link_timer failed"); ESP_GOTO_ON_ERROR(esp_event_post(ETH_EVENT, ETHERNET_EVENT_STOP, &eth_driver, sizeof(esp_eth_driver_t *), 0),
ESP_GOTO_ON_ERROR(esp_event_post(ETH_EVENT, ETHERNET_EVENT_STOP, &eth_driver, sizeof(esp_eth_driver_t *), 0), err, TAG, "send ETHERNET_EVENT_STOP event failed"); err, TAG, "send ETHERNET_EVENT_STOP event failed");
return ESP_OK;
err: err:
return ret; return ret;
} }
@@ -314,7 +311,6 @@ esp_err_t esp_eth_update_input_path(
ESP_GOTO_ON_FALSE(eth_driver, ESP_ERR_INVALID_ARG, err, TAG, "ethernet driver handle can't be null"); ESP_GOTO_ON_FALSE(eth_driver, ESP_ERR_INVALID_ARG, err, TAG, "ethernet driver handle can't be null");
eth_driver->priv = priv; eth_driver->priv = priv;
eth_driver->stack_input = stack_input; eth_driver->stack_input = stack_input;
return ESP_OK;
err: err:
return ret; return ret;
} }
@@ -327,7 +323,7 @@ esp_err_t esp_eth_transmit(esp_eth_handle_t hdl, void *buf, size_t length)
ESP_GOTO_ON_FALSE(length, ESP_ERR_INVALID_ARG, err, TAG, "buf length can't be zero"); ESP_GOTO_ON_FALSE(length, ESP_ERR_INVALID_ARG, err, TAG, "buf length can't be zero");
ESP_GOTO_ON_FALSE(eth_driver, ESP_ERR_INVALID_ARG, err, TAG, "ethernet driver handle can't be null"); ESP_GOTO_ON_FALSE(eth_driver, ESP_ERR_INVALID_ARG, err, TAG, "ethernet driver handle can't be null");
esp_eth_mac_t *mac = eth_driver->mac; esp_eth_mac_t *mac = eth_driver->mac;
return mac->transmit(mac, buf, length); ret = mac->transmit(mac, buf, length);
err: err:
return ret; return ret;
} }
@@ -340,7 +336,7 @@ esp_err_t esp_eth_receive(esp_eth_handle_t hdl, uint8_t *buf, uint32_t *length)
ESP_GOTO_ON_FALSE(*length > 60, ESP_ERR_INVALID_ARG, err, TAG, "length can't be less than 60"); ESP_GOTO_ON_FALSE(*length > 60, ESP_ERR_INVALID_ARG, err, TAG, "length can't be less than 60");
ESP_GOTO_ON_FALSE(eth_driver, ESP_ERR_INVALID_ARG, err, TAG, "ethernet driver handle can't be null"); ESP_GOTO_ON_FALSE(eth_driver, ESP_ERR_INVALID_ARG, err, TAG, "ethernet driver handle can't be null");
esp_eth_mac_t *mac = eth_driver->mac; esp_eth_mac_t *mac = eth_driver->mac;
return mac->receive(mac, buf, length); ret = mac->receive(mac, buf, length);
err: err:
return ret; return ret;
} }
@@ -388,7 +384,6 @@ esp_err_t esp_eth_ioctl(esp_eth_handle_t hdl, esp_eth_io_cmd_t cmd, void *data)
ESP_GOTO_ON_FALSE(false, ESP_ERR_INVALID_ARG, err, TAG, "unknown io command: %d", cmd); ESP_GOTO_ON_FALSE(false, ESP_ERR_INVALID_ARG, err, TAG, "unknown io command: %d", cmd);
break; break;
} }
return ESP_OK;
err: err:
return ret; return ret;
} }
@@ -399,7 +394,6 @@ esp_err_t esp_eth_increase_reference(esp_eth_handle_t hdl)
esp_eth_driver_t *eth_driver = (esp_eth_driver_t *)hdl; esp_eth_driver_t *eth_driver = (esp_eth_driver_t *)hdl;
ESP_GOTO_ON_FALSE(eth_driver, ESP_ERR_INVALID_ARG, err, TAG, "ethernet driver handle can't be null"); ESP_GOTO_ON_FALSE(eth_driver, ESP_ERR_INVALID_ARG, err, TAG, "ethernet driver handle can't be null");
atomic_fetch_add(&eth_driver->ref_count, 1); atomic_fetch_add(&eth_driver->ref_count, 1);
return ESP_OK;
err: err:
return ret; return ret;
} }
@@ -410,7 +404,6 @@ esp_err_t esp_eth_decrease_reference(esp_eth_handle_t hdl)
esp_eth_driver_t *eth_driver = (esp_eth_driver_t *)hdl; esp_eth_driver_t *eth_driver = (esp_eth_driver_t *)hdl;
ESP_GOTO_ON_FALSE(eth_driver, ESP_ERR_INVALID_ARG, err, TAG, "ethernet driver handle can't be null"); ESP_GOTO_ON_FALSE(eth_driver, ESP_ERR_INVALID_ARG, err, TAG, "ethernet driver handle can't be null");
atomic_fetch_sub(&eth_driver->ref_count, 1); atomic_fetch_sub(&eth_driver->ref_count, 1);
return ESP_OK;
err: err:
return ret; return ret;
} }