ethernet_component.cpp

Go to the documentation of this file.

#include "ethernet_component.h"
#include "esphome/core/application.h"
#include "esphome/core/log.h"
#include "esphome/core/util.h"
 
#ifdef USE_ESP32
 
#include <lwip/dns.h>
#include <cinttypes>
#include "esp_event.h"
 
#ifdef USE_ETHERNET_LAN8670
#include "esp_eth_phy_lan867x.h"
#endif
 
#ifdef USE_ETHERNET_SPI
#include <driver/gpio.h>
#include <driver/spi_master.h>
#endif
 
namespace esphome {
namespace ethernet {
 
#if ESP_IDF_VERSION < ESP_IDF_VERSION_VAL(5, 4, 2)
// work around IDF compile issue on P4 https://github.com/espressif/esp-idf/pull/15637
#ifdef USE_ESP32_VARIANT_ESP32P4
#undef ETH_ESP32_EMAC_DEFAULT_CONFIG
#define ETH_ESP32_EMAC_DEFAULT_CONFIG() \
  { \
    .smi_gpio = {.mdc_num = 31, .mdio_num = 52}, .interface = EMAC_DATA_INTERFACE_RMII, \
    .clock_config = {.rmii = {.clock_mode = EMAC_CLK_EXT_IN, .clock_gpio = (emac_rmii_clock_gpio_t) 50}}, \
    .dma_burst_len = ETH_DMA_BURST_LEN_32, .intr_priority = 0, \
    .emac_dataif_gpio = \
        {.rmii = {.tx_en_num = 49, .txd0_num = 34, .txd1_num = 35, .crs_dv_num = 28, .rxd0_num = 29, .rxd1_num = 30}}, \
    .clock_config_out_in = {.rmii = {.clock_mode = EMAC_CLK_EXT_IN, .clock_gpio = (emac_rmii_clock_gpio_t) -1}}, \
  }
#endif
#endif
 
static const char *const TAG = "ethernet";
 
EthernetComponent *global_eth_component;  // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
 
#define ESPHL_ERROR_CHECK(err, message) \
  if ((err) != ESP_OK) { \
    ESP_LOGE(TAG, message ": (%d) %s", err, esp_err_to_name(err)); \
    this->mark_failed(); \
    return; \
  }
 
#define ESPHL_ERROR_CHECK_RET(err, message, ret) \
  if ((err) != ESP_OK) { \
    ESP_LOGE(TAG, message ": (%d) %s", err, esp_err_to_name(err)); \
    this->mark_failed(); \
    return ret; \
  }
 
EthernetComponent::EthernetComponent() { global_eth_component = this; }
 
void EthernetComponent::setup() {
  if (esp_reset_reason() != ESP_RST_DEEPSLEEP) {
    // Delay here to allow power to stabilise before Ethernet is initialized.
    delay(300);  // NOLINT
  }
 
  esp_err_t err;
 
#ifdef USE_ETHERNET_SPI
  // Install GPIO ISR handler to be able to service SPI Eth modules interrupts
  gpio_install_isr_service(0);
 
  spi_bus_config_t buscfg = {
      .mosi_io_num = this->mosi_pin_,
      .miso_io_num = this->miso_pin_,
      .sclk_io_num = this->clk_pin_,
      .quadwp_io_num = -1,
      .quadhd_io_num = -1,
      .data4_io_num = -1,
      .data5_io_num = -1,
      .data6_io_num = -1,
      .data7_io_num = -1,
      .max_transfer_sz = 0,
      .flags = 0,
      .intr_flags = 0,
  };
 
#if defined(USE_ESP32_VARIANT_ESP32C3) || defined(USE_ESP32_VARIANT_ESP32S2) || defined(USE_ESP32_VARIANT_ESP32S3) || \
    defined(USE_ESP32_VARIANT_ESP32C6)
  auto host = SPI2_HOST;
#else
  auto host = SPI3_HOST;
#endif
 
  err = spi_bus_initialize(host, &buscfg, SPI_DMA_CH_AUTO);
  ESPHL_ERROR_CHECK(err, "SPI bus initialize error");
#endif
 
  err = esp_netif_init();
  ESPHL_ERROR_CHECK(err, "ETH netif init error");
  err = esp_event_loop_create_default();
  ESPHL_ERROR_CHECK(err, "ETH event loop error");
 
  esp_netif_config_t cfg = ESP_NETIF_DEFAULT_ETH();
  this->eth_netif_ = esp_netif_new(&cfg);
 
  // Init MAC and PHY configs to default
  eth_phy_config_t phy_config = ETH_PHY_DEFAULT_CONFIG();
  eth_mac_config_t mac_config = ETH_MAC_DEFAULT_CONFIG();
 
#ifdef USE_ETHERNET_SPI  // Configure SPI interface and Ethernet driver for specific SPI module
  spi_device_interface_config_t devcfg = {
      .command_bits = 0,
      .address_bits = 0,
      .dummy_bits = 0,
      .mode = 0,
      .duty_cycle_pos = 0,
      .cs_ena_pretrans = 0,
      .cs_ena_posttrans = 0,
      .clock_speed_hz = this->clock_speed_,
      .input_delay_ns = 0,
      .spics_io_num = this->cs_pin_,
      .flags = 0,
      .queue_size = 20,
      .pre_cb = nullptr,
      .post_cb = nullptr,
  };
 
#if CONFIG_ETH_SPI_ETHERNET_W5500
  eth_w5500_config_t w5500_config = ETH_W5500_DEFAULT_CONFIG(host, &devcfg);
#endif
#if CONFIG_ETH_SPI_ETHERNET_DM9051
  eth_dm9051_config_t dm9051_config = ETH_DM9051_DEFAULT_CONFIG(host, &devcfg);
#endif
 
#if CONFIG_ETH_SPI_ETHERNET_W5500
  w5500_config.int_gpio_num = this->interrupt_pin_;
#ifdef USE_ETHERNET_SPI_POLLING_SUPPORT
  w5500_config.poll_period_ms = this->polling_interval_;
#endif
#endif
 
#if CONFIG_ETH_SPI_ETHERNET_DM9051
  dm9051_config.int_gpio_num = this->interrupt_pin_;
#ifdef USE_ETHERNET_SPI_POLLING_SUPPORT
  dm9051_config.poll_period_ms = this->polling_interval_;
#endif
#endif
 
  phy_config.phy_addr = this->phy_addr_spi_;
  phy_config.reset_gpio_num = this->reset_pin_;
 
  esp_eth_mac_t *mac = nullptr;
#elif defined(USE_ETHERNET_OPENETH)
  esp_eth_mac_t *mac = esp_eth_mac_new_openeth(&mac_config);
#else
  phy_config.phy_addr = this->phy_addr_;
  phy_config.reset_gpio_num = this->power_pin_;
 
  eth_esp32_emac_config_t esp32_emac_config = ETH_ESP32_EMAC_DEFAULT_CONFIG();
#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 3, 0)
  esp32_emac_config.smi_gpio.mdc_num = this->mdc_pin_;
  esp32_emac_config.smi_gpio.mdio_num = this->mdio_pin_;
#else
  esp32_emac_config.smi_mdc_gpio_num = this->mdc_pin_;
  esp32_emac_config.smi_mdio_gpio_num = this->mdio_pin_;
#endif
  esp32_emac_config.clock_config.rmii.clock_mode = this->clk_mode_;
  esp32_emac_config.clock_config.rmii.clock_gpio = (emac_rmii_clock_gpio_t) this->clk_pin_;
 
  esp_eth_mac_t *mac = esp_eth_mac_new_esp32(&esp32_emac_config, &mac_config);
#endif
 
  switch (this->type_) {
#ifdef USE_ETHERNET_OPENETH
    case ETHERNET_TYPE_OPENETH: {
      phy_config.autonego_timeout_ms = 1000;
      this->phy_ = esp_eth_phy_new_dp83848(&phy_config);
      break;
    }
#endif
#if CONFIG_ETH_USE_ESP32_EMAC
    case ETHERNET_TYPE_LAN8720: {
      this->phy_ = esp_eth_phy_new_lan87xx(&phy_config);
      break;
    }
    case ETHERNET_TYPE_RTL8201: {
      this->phy_ = esp_eth_phy_new_rtl8201(&phy_config);
      break;
    }
    case ETHERNET_TYPE_DP83848: {
      this->phy_ = esp_eth_phy_new_dp83848(&phy_config);
      break;
    }
    case ETHERNET_TYPE_IP101: {
      this->phy_ = esp_eth_phy_new_ip101(&phy_config);
      break;
    }
    case ETHERNET_TYPE_JL1101: {
      this->phy_ = esp_eth_phy_new_jl1101(&phy_config);
      break;
    }
    case ETHERNET_TYPE_KSZ8081:
    case ETHERNET_TYPE_KSZ8081RNA: {
      this->phy_ = esp_eth_phy_new_ksz80xx(&phy_config);
      break;
    }
#ifdef USE_ETHERNET_LAN8670
    case ETHERNET_TYPE_LAN8670: {
      this->phy_ = esp_eth_phy_new_lan867x(&phy_config);
      break;
    }
#endif
#endif
#ifdef USE_ETHERNET_SPI
#if CONFIG_ETH_SPI_ETHERNET_W5500
    case ETHERNET_TYPE_W5500: {
      mac = esp_eth_mac_new_w5500(&w5500_config, &mac_config);
      this->phy_ = esp_eth_phy_new_w5500(&phy_config);
      break;
    }
#endif
#if CONFIG_ETH_SPI_ETHERNET_DM9051
    case ETHERNET_TYPE_DM9051: {
      mac = esp_eth_mac_new_dm9051(&dm9051_config, &mac_config);
      this->phy_ = esp_eth_phy_new_dm9051(&phy_config);
      break;
    }
#endif
#endif
    default: {
      this->mark_failed();
      return;
    }
  }
 
  esp_eth_config_t eth_config = ETH_DEFAULT_CONFIG(mac, this->phy_);
  this->eth_handle_ = nullptr;
  err = esp_eth_driver_install(&eth_config, &this->eth_handle_);
  ESPHL_ERROR_CHECK(err, "ETH driver install error");
 
#ifndef USE_ETHERNET_SPI
#ifdef USE_ETHERNET_KSZ8081
  if (this->type_ == ETHERNET_TYPE_KSZ8081RNA && this->clk_mode_ == EMAC_CLK_OUT) {
    // KSZ8081RNA default is incorrect. It expects a 25MHz clock instead of the 50MHz we provide.
    this->ksz8081_set_clock_reference_(mac);
  }
#endif  // USE_ETHERNET_KSZ8081
 
  for (const auto &phy_register : this->phy_registers_) {
    this->write_phy_register_(mac, phy_register);
  }
#endif
 
  // use ESP internal eth mac
  uint8_t mac_addr[6];
  esp_read_mac(mac_addr, ESP_MAC_ETH);
  err = esp_eth_ioctl(this->eth_handle_, ETH_CMD_S_MAC_ADDR, mac_addr);
  ESPHL_ERROR_CHECK(err, "set mac address error");
 
  /* attach Ethernet driver to TCP/IP stack */
  err = esp_netif_attach(this->eth_netif_, esp_eth_new_netif_glue(this->eth_handle_));
  ESPHL_ERROR_CHECK(err, "ETH netif attach error");
 
  // Register user defined event handers
  err = esp_event_handler_register(ETH_EVENT, ESP_EVENT_ANY_ID, &EthernetComponent::eth_event_handler, nullptr);
  ESPHL_ERROR_CHECK(err, "ETH event handler register error");
  err = esp_event_handler_register(IP_EVENT, IP_EVENT_ETH_GOT_IP, &EthernetComponent::got_ip_event_handler, nullptr);
  ESPHL_ERROR_CHECK(err, "GOT IP event handler register error");
#if USE_NETWORK_IPV6
  err = esp_event_handler_register(IP_EVENT, IP_EVENT_GOT_IP6, &EthernetComponent::got_ip6_event_handler, nullptr);
  ESPHL_ERROR_CHECK(err, "GOT IPv6 event handler register error");
#endif /* USE_NETWORK_IPV6 */
 
  /* start Ethernet driver state machine */
  err = esp_eth_start(this->eth_handle_);
  ESPHL_ERROR_CHECK(err, "ETH start error");
}
 
void EthernetComponent::loop() {
  const uint32_t now = App.get_loop_component_start_time();
 
  switch (this->state_) {
    case EthernetComponentState::STOPPED:
      if (this->started_) {
        ESP_LOGI(TAG, "Starting connection");
        this->state_ = EthernetComponentState::CONNECTING;
        this->start_connect_();
      }
      break;
    case EthernetComponentState::CONNECTING:
      if (!this->started_) {
        ESP_LOGI(TAG, "Stopped connection");
        this->state_ = EthernetComponentState::STOPPED;
      } else if (this->connected_) {
        // connection established
        ESP_LOGI(TAG, "Connected");
        this->state_ = EthernetComponentState::CONNECTED;
 
        this->dump_connect_params_();
        this->status_clear_warning();
      } else if (now - this->connect_begin_ > 15000) {
        ESP_LOGW(TAG, "Connecting failed; reconnecting");
        this->start_connect_();
      }
      break;
    case EthernetComponentState::CONNECTED:
      if (!this->started_) {
        ESP_LOGI(TAG, "Stopped connection");
        this->state_ = EthernetComponentState::STOPPED;
      } else if (!this->connected_) {
        ESP_LOGW(TAG, "Connection lost; reconnecting");
        this->state_ = EthernetComponentState::CONNECTING;
        this->start_connect_();
      } else {
        this->finish_connect_();
        // When connected and stable, disable the loop to save CPU cycles
        this->disable_loop();
      }
      break;
  }
}
 
void EthernetComponent::dump_config() {
  const char *eth_type;
  switch (this->type_) {
    case ETHERNET_TYPE_LAN8720:
      eth_type = "LAN8720";
      break;
 
    case ETHERNET_TYPE_RTL8201:
      eth_type = "RTL8201";
      break;
 
    case ETHERNET_TYPE_DP83848:
      eth_type = "DP83848";
      break;
 
    case ETHERNET_TYPE_IP101:
      eth_type = "IP101";
      break;
 
    case ETHERNET_TYPE_JL1101:
      eth_type = "JL1101";
      break;
 
    case ETHERNET_TYPE_KSZ8081:
      eth_type = "KSZ8081";
      break;
 
    case ETHERNET_TYPE_KSZ8081RNA:
      eth_type = "KSZ8081RNA";
      break;
 
    case ETHERNET_TYPE_W5500:
      eth_type = "W5500";
      break;
 
    case ETHERNET_TYPE_OPENETH:
      eth_type = "OPENETH";
      break;
 
    case ETHERNET_TYPE_DM9051:
      eth_type = "DM9051";
      break;
 
#ifdef USE_ETHERNET_LAN8670
    case ETHERNET_TYPE_LAN8670:
      eth_type = "LAN8670";
      break;
#endif
 
    default:
      eth_type = "Unknown";
      break;
  }
 
  ESP_LOGCONFIG(TAG, "Ethernet:");
  this->dump_connect_params_();
#ifdef USE_ETHERNET_SPI
  ESP_LOGCONFIG(TAG,
                "  CLK Pin: %u\n"
                "  MISO Pin: %u\n"
                "  MOSI Pin: %u\n"
                "  CS Pin: %u",
                this->clk_pin_, this->miso_pin_, this->mosi_pin_, this->cs_pin_);
#ifdef USE_ETHERNET_SPI_POLLING_SUPPORT
  if (this->polling_interval_ != 0) {
    ESP_LOGCONFIG(TAG, "  Polling Interval: %lu ms", this->polling_interval_);
  } else
#endif
  {
    ESP_LOGCONFIG(TAG, "  IRQ Pin: %d", this->interrupt_pin_);
  }
  ESP_LOGCONFIG(TAG,
                "  Reset Pin: %d\n"
                "  Clock Speed: %d MHz",
                this->reset_pin_, this->clock_speed_ / 1000000);
#else
  if (this->power_pin_ != -1) {
    ESP_LOGCONFIG(TAG, "  Power Pin: %u", this->power_pin_);
  }
  ESP_LOGCONFIG(TAG,
                "  CLK Pin: %u\n"
                "  MDC Pin: %u\n"
                "  MDIO Pin: %u\n"
                "  PHY addr: %u",
                this->clk_pin_, this->mdc_pin_, this->mdio_pin_, this->phy_addr_);
#endif
  ESP_LOGCONFIG(TAG, "  Type: %s", eth_type);
}
 
float EthernetComponent::get_setup_priority() const { return setup_priority::WIFI; }
 
bool EthernetComponent::can_proceed() { return this->is_connected(); }
 
network::IPAddresses EthernetComponent::get_ip_addresses() {
  network::IPAddresses addresses;
  esp_netif_ip_info_t ip;
  esp_err_t err = esp_netif_get_ip_info(this->eth_netif_, &ip);
  if (err != ESP_OK) {
    ESP_LOGV(TAG, "esp_netif_get_ip_info failed: %s", esp_err_to_name(err));
    // TODO: do something smarter
    // return false;
  } else {
    addresses[0] = network::IPAddress(&ip.ip);
  }
#if USE_NETWORK_IPV6
  struct esp_ip6_addr if_ip6s[CONFIG_LWIP_IPV6_NUM_ADDRESSES];
  uint8_t count = 0;
  count = esp_netif_get_all_ip6(this->eth_netif_, if_ip6s);
  assert(count <= CONFIG_LWIP_IPV6_NUM_ADDRESSES);
  for (int i = 0; i < count; i++) {
    addresses[i + 1] = network::IPAddress(&if_ip6s[i]);
  }
#endif /* USE_NETWORK_IPV6 */
 
  return addresses;
}
 
network::IPAddress EthernetComponent::get_dns_address(uint8_t num) {
  LwIPLock lock;
  const ip_addr_t *dns_ip = dns_getserver(num);
  return dns_ip;
}
 
void EthernetComponent::eth_event_handler(void *arg, esp_event_base_t event_base, int32_t event, void *event_data) {
  const char *event_name;
 
  switch (event) {
    case ETHERNET_EVENT_START:
      event_name = "ETH started";
      global_eth_component->started_ = true;
      global_eth_component->enable_loop_soon_any_context();
      break;
    case ETHERNET_EVENT_STOP:
      event_name = "ETH stopped";
      global_eth_component->started_ = false;
      global_eth_component->connected_ = false;
      global_eth_component->enable_loop_soon_any_context();  // Enable loop when connection state changes
      break;
    case ETHERNET_EVENT_CONNECTED:
      event_name = "ETH connected";
      break;
    case ETHERNET_EVENT_DISCONNECTED:
      event_name = "ETH disconnected";
      global_eth_component->connected_ = false;
      global_eth_component->enable_loop_soon_any_context();  // Enable loop when connection state changes
      break;
    default:
      return;
  }
 
  ESP_LOGV(TAG, "[Ethernet event] %s (num=%" PRId32 ")", event_name, event);
}
 
void EthernetComponent::got_ip_event_handler(void *arg, esp_event_base_t event_base, int32_t event_id,
                                             void *event_data) {
  ip_event_got_ip_t *event = (ip_event_got_ip_t *) event_data;
  const esp_netif_ip_info_t *ip_info = &event->ip_info;
  ESP_LOGV(TAG, "[Ethernet event] ETH Got IP " IPSTR, IP2STR(&ip_info->ip));
  global_eth_component->got_ipv4_address_ = true;
#if USE_NETWORK_IPV6 && (USE_NETWORK_MIN_IPV6_ADDR_COUNT > 0)
  global_eth_component->connected_ = global_eth_component->ipv6_count_ >= USE_NETWORK_MIN_IPV6_ADDR_COUNT;
  global_eth_component->enable_loop_soon_any_context();  // Enable loop when connection state changes
#else
  global_eth_component->connected_ = true;
  global_eth_component->enable_loop_soon_any_context();  // Enable loop when connection state changes
#endif /* USE_NETWORK_IPV6 */
}
 
#if USE_NETWORK_IPV6
void EthernetComponent::got_ip6_event_handler(void *arg, esp_event_base_t event_base, int32_t event_id,
                                              void *event_data) {
  ip_event_got_ip6_t *event = (ip_event_got_ip6_t *) event_data;
  ESP_LOGV(TAG, "[Ethernet event] ETH Got IPv6: " IPV6STR, IPV62STR(event->ip6_info.ip));
  global_eth_component->ipv6_count_ += 1;
#if (USE_NETWORK_MIN_IPV6_ADDR_COUNT > 0)
  global_eth_component->connected_ =
      global_eth_component->got_ipv4_address_ && (global_eth_component->ipv6_count_ >= USE_NETWORK_MIN_IPV6_ADDR_COUNT);
  global_eth_component->enable_loop_soon_any_context();  // Enable loop when connection state changes
#else
  global_eth_component->connected_ = global_eth_component->got_ipv4_address_;
  global_eth_component->enable_loop_soon_any_context();  // Enable loop when connection state changes
#endif
}
#endif /* USE_NETWORK_IPV6 */
 
void EthernetComponent::finish_connect_() {
#if USE_NETWORK_IPV6
  // Retry IPv6 link-local setup if it failed during initial connect
  // This handles the case where min_ipv6_addr_count is NOT set (or is 0),
  // allowing us to reach CONNECTED state with just IPv4.
  // If IPv6 setup failed in start_connect_() because the interface wasn't ready:
  // - Bootup timing issues (#10281)
  // - Cable unplugged/network interruption (#10705)
  // We can now retry since we're in CONNECTED state and the interface is definitely up.
  if (!this->ipv6_setup_done_) {
    esp_err_t err = esp_netif_create_ip6_linklocal(this->eth_netif_);
    if (err == ESP_OK) {
      ESP_LOGD(TAG, "IPv6 link-local address created (retry succeeded)");
    }
    // Always set the flag to prevent continuous retries
    // If IPv6 setup fails here with the interface up and stable, it's
    // likely a persistent issue (IPv6 disabled at router, hardware
    // limitation, etc.) that won't be resolved by further retries.
    // The device continues to work with IPv4.
    this->ipv6_setup_done_ = true;
  }
#endif /* USE_NETWORK_IPV6 */
}
 
void EthernetComponent::start_connect_() {
  global_eth_component->got_ipv4_address_ = false;
#if USE_NETWORK_IPV6
  global_eth_component->ipv6_count_ = 0;
  this->ipv6_setup_done_ = false;
#endif /* USE_NETWORK_IPV6 */
  this->connect_begin_ = millis();
  this->status_set_warning(LOG_STR("waiting for IP configuration"));
 
  esp_err_t err;
  err = esp_netif_set_hostname(this->eth_netif_, App.get_name().c_str());
  if (err != ERR_OK) {
    ESP_LOGW(TAG, "esp_netif_set_hostname failed: %s", esp_err_to_name(err));
  }
 
  esp_netif_ip_info_t info;
  if (this->manual_ip_.has_value()) {
    info.ip = this->manual_ip_->static_ip;
    info.gw = this->manual_ip_->gateway;
    info.netmask = this->manual_ip_->subnet;
  } else {
    info.ip.addr = 0;
    info.gw.addr = 0;
    info.netmask.addr = 0;
  }
 
  esp_netif_dhcp_status_t status = ESP_NETIF_DHCP_INIT;
 
  err = esp_netif_dhcpc_get_status(this->eth_netif_, &status);
  ESPHL_ERROR_CHECK(err, "DHCPC Get Status Failed!");
 
  ESP_LOGV(TAG, "DHCP Client Status: %d", status);
 
  err = esp_netif_dhcpc_stop(this->eth_netif_);
  if (err != ESP_ERR_ESP_NETIF_DHCP_ALREADY_STOPPED) {
    ESPHL_ERROR_CHECK(err, "DHCPC stop error");
  }
 
  err = esp_netif_set_ip_info(this->eth_netif_, &info);
  ESPHL_ERROR_CHECK(err, "DHCPC set IP info error");
 
  if (this->manual_ip_.has_value()) {
    LwIPLock lock;
    if (this->manual_ip_->dns1.is_set()) {
      ip_addr_t d;
      d = this->manual_ip_->dns1;
      dns_setserver(0, &d);
    }
    if (this->manual_ip_->dns2.is_set()) {
      ip_addr_t d;
      d = this->manual_ip_->dns2;
      dns_setserver(1, &d);
    }
  } else {
    err = esp_netif_dhcpc_start(this->eth_netif_);
    if (err != ESP_ERR_ESP_NETIF_DHCP_ALREADY_STARTED) {
      ESPHL_ERROR_CHECK(err, "DHCPC start error");
    }
  }
#if USE_NETWORK_IPV6
  // Attempt to create IPv6 link-local address
  // We MUST attempt this here, not just in finish_connect_(), because with
  // min_ipv6_addr_count set, the component won't reach CONNECTED state without IPv6.
  // However, this may fail with ESP_FAIL if the interface is not up yet:
  // - At bootup when link isn't ready (#10281)
  // - After disconnection/cable unplugged (#10705)
  // We'll retry in finish_connect_() if it fails here.
  err = esp_netif_create_ip6_linklocal(this->eth_netif_);
  if (err != ESP_OK) {
    if (err == ESP_ERR_ESP_NETIF_INVALID_PARAMS) {
      // This is a programming error, not a transient failure
      ESPHL_ERROR_CHECK(err, "esp_netif_create_ip6_linklocal invalid parameters");
    } else {
      // ESP_FAIL means the interface isn't up yet
      // This is expected and non-fatal, happens in multiple scenarios:
      // - During reconnection after network interruptions (#10705)
      // - At bootup when the link isn't ready yet (#10281)
      // We'll retry once we reach CONNECTED state and the interface is up
      ESP_LOGW(TAG, "esp_netif_create_ip6_linklocal failed: %s", esp_err_to_name(err));
      // Don't mark component as failed - this is a transient error
    }
  }
#endif /* USE_NETWORK_IPV6 */
 
  this->connect_begin_ = millis();
  this->status_set_warning();
}
 
bool EthernetComponent::is_connected() { return this->state_ == EthernetComponentState::CONNECTED; }
 
void EthernetComponent::dump_connect_params_() {
  esp_netif_ip_info_t ip;
  esp_netif_get_ip_info(this->eth_netif_, &ip);
  const ip_addr_t *dns_ip1;
  const ip_addr_t *dns_ip2;
  {
    LwIPLock lock;
    dns_ip1 = dns_getserver(0);
    dns_ip2 = dns_getserver(1);
  }
 
  ESP_LOGCONFIG(TAG,
                "  IP Address: %s\n"
                "  Hostname: '%s'\n"
                "  Subnet: %s\n"
                "  Gateway: %s\n"
                "  DNS1: %s\n"
                "  DNS2: %s",
                network::IPAddress(&ip.ip).str().c_str(), App.get_name().c_str(),
                network::IPAddress(&ip.netmask).str().c_str(), network::IPAddress(&ip.gw).str().c_str(),
                network::IPAddress(dns_ip1).str().c_str(), network::IPAddress(dns_ip2).str().c_str());
 
#if USE_NETWORK_IPV6
  struct esp_ip6_addr if_ip6s[CONFIG_LWIP_IPV6_NUM_ADDRESSES];
  uint8_t count = 0;
  count = esp_netif_get_all_ip6(this->eth_netif_, if_ip6s);
  assert(count <= CONFIG_LWIP_IPV6_NUM_ADDRESSES);
  for (int i = 0; i < count; i++) {
    ESP_LOGCONFIG(TAG, "  IPv6: " IPV6STR, IPV62STR(if_ip6s[i]));
  }
#endif /* USE_NETWORK_IPV6 */
 
  ESP_LOGCONFIG(TAG,
                "  MAC Address: %s\n"
                "  Is Full Duplex: %s\n"
                "  Link Speed: %u",
                this->get_eth_mac_address_pretty().c_str(), YESNO(this->get_duplex_mode() == ETH_DUPLEX_FULL),
                this->get_link_speed() == ETH_SPEED_100M ? 100 : 10);
}
 
#ifdef USE_ETHERNET_SPI
void EthernetComponent::set_clk_pin(uint8_t clk_pin) { this->clk_pin_ = clk_pin; }
void EthernetComponent::set_miso_pin(uint8_t miso_pin) { this->miso_pin_ = miso_pin; }
void EthernetComponent::set_mosi_pin(uint8_t mosi_pin) { this->mosi_pin_ = mosi_pin; }
void EthernetComponent::set_cs_pin(uint8_t cs_pin) { this->cs_pin_ = cs_pin; }
void EthernetComponent::set_interrupt_pin(uint8_t interrupt_pin) { this->interrupt_pin_ = interrupt_pin; }
void EthernetComponent::set_reset_pin(uint8_t reset_pin) { this->reset_pin_ = reset_pin; }
void EthernetComponent::set_clock_speed(int clock_speed) { this->clock_speed_ = clock_speed; }
#ifdef USE_ETHERNET_SPI_POLLING_SUPPORT
void EthernetComponent::set_polling_interval(uint32_t polling_interval) { this->polling_interval_ = polling_interval; }
#endif
#else
void EthernetComponent::set_phy_addr(uint8_t phy_addr) { this->phy_addr_ = phy_addr; }
void EthernetComponent::set_power_pin(int power_pin) { this->power_pin_ = power_pin; }
void EthernetComponent::set_mdc_pin(uint8_t mdc_pin) { this->mdc_pin_ = mdc_pin; }
void EthernetComponent::set_mdio_pin(uint8_t mdio_pin) { this->mdio_pin_ = mdio_pin; }
void EthernetComponent::set_clk_pin(uint8_t clk_pin) { this->clk_pin_ = clk_pin; }
void EthernetComponent::set_clk_mode(emac_rmii_clock_mode_t clk_mode) { this->clk_mode_ = clk_mode; }
void EthernetComponent::add_phy_register(PHYRegister register_value) { this->phy_registers_.push_back(register_value); }
#endif
void EthernetComponent::set_type(EthernetType type) { this->type_ = type; }
void EthernetComponent::set_manual_ip(const ManualIP &manual_ip) { this->manual_ip_ = manual_ip; }
 
std::string EthernetComponent::get_use_address() const {
  if (this->use_address_.empty()) {
    return App.get_name() + ".local";
  }
  return this->use_address_;
}
 
void EthernetComponent::set_use_address(const std::string &use_address) { this->use_address_ = use_address; }
 
void EthernetComponent::get_eth_mac_address_raw(uint8_t *mac) {
  esp_err_t err;
  err = esp_eth_ioctl(this->eth_handle_, ETH_CMD_G_MAC_ADDR, mac);
  ESPHL_ERROR_CHECK(err, "ETH_CMD_G_MAC error");
}
 
std::string EthernetComponent::get_eth_mac_address_pretty() {
  uint8_t mac[6];
  get_eth_mac_address_raw(mac);
  char buf[18];
  format_mac_addr_upper(mac, buf);
  return std::string(buf);
}
 
eth_duplex_t EthernetComponent::get_duplex_mode() {
  esp_err_t err;
  eth_duplex_t duplex_mode;
  err = esp_eth_ioctl(this->eth_handle_, ETH_CMD_G_DUPLEX_MODE, &duplex_mode);
  ESPHL_ERROR_CHECK_RET(err, "ETH_CMD_G_DUPLEX_MODE error", ETH_DUPLEX_HALF);
  return duplex_mode;
}
 
eth_speed_t EthernetComponent::get_link_speed() {
  esp_err_t err;
  eth_speed_t speed;
  err = esp_eth_ioctl(this->eth_handle_, ETH_CMD_G_SPEED, &speed);
  ESPHL_ERROR_CHECK_RET(err, "ETH_CMD_G_SPEED error", ETH_SPEED_10M);
  return speed;
}
 
bool EthernetComponent::powerdown() {
  ESP_LOGI(TAG, "Powering down ethernet PHY");
  if (this->phy_ == nullptr) {
    ESP_LOGE(TAG, "Ethernet PHY not assigned");
    return false;
  }
  this->connected_ = false;
  this->started_ = false;
  // No need to enable_loop() here as this is only called during shutdown/reboot
  if (this->phy_->pwrctl(this->phy_, false) != ESP_OK) {
    ESP_LOGE(TAG, "Error powering down ethernet PHY");
    return false;
  }
  return true;
}
 
#ifndef USE_ETHERNET_SPI
 
#ifdef USE_ETHERNET_KSZ8081
constexpr uint8_t KSZ80XX_PC2R_REG_ADDR = 0x1F;
 
void EthernetComponent::ksz8081_set_clock_reference_(esp_eth_mac_t *mac) {
  esp_err_t err;
 
  uint32_t phy_control_2;
  err = mac->read_phy_reg(mac, this->phy_addr_, KSZ80XX_PC2R_REG_ADDR, &(phy_control_2));
  ESPHL_ERROR_CHECK(err, "Read PHY Control 2 failed");
  ESP_LOGVV(TAG, "KSZ8081 PHY Control 2: %s", format_hex_pretty((u_int8_t *) &phy_control_2, 2).c_str());
 
  /*
   * Bit 7 is `RMII Reference Clock Select`. Default is `0`.
   * KSZ8081RNA:
   *   0 - clock input to XI (Pin 8) is 25 MHz for RMII - 25 MHz clock mode.
   *   1 - clock input to XI (Pin 8) is 50 MHz for RMII - 50 MHz clock mode.
   * KSZ8081RND:
   *   0 - clock input to XI (Pin 8) is 50 MHz for RMII - 50 MHz clock mode.
   *   1 - clock input to XI (Pin 8) is 25 MHz (driven clock only, not a crystal) for RMII - 25 MHz clock mode.
   */
  if ((phy_control_2 & (1 << 7)) != (1 << 7)) {
    phy_control_2 |= 1 << 7;
    err = mac->write_phy_reg(mac, this->phy_addr_, KSZ80XX_PC2R_REG_ADDR, phy_control_2);
    ESPHL_ERROR_CHECK(err, "Write PHY Control 2 failed");
    err = mac->read_phy_reg(mac, this->phy_addr_, KSZ80XX_PC2R_REG_ADDR, &(phy_control_2));
    ESPHL_ERROR_CHECK(err, "Read PHY Control 2 failed");
    ESP_LOGVV(TAG, "KSZ8081 PHY Control 2: %s", format_hex_pretty((u_int8_t *) &phy_control_2, 2).c_str());
  }
}
#endif  // USE_ETHERNET_KSZ8081
 
void EthernetComponent::write_phy_register_(esp_eth_mac_t *mac, PHYRegister register_data) {
  esp_err_t err;
  constexpr uint8_t eth_phy_psr_reg_addr = 0x1F;
 
  if (this->type_ == ETHERNET_TYPE_RTL8201 && register_data.page) {
    ESP_LOGD(TAG, "Select PHY Register Page: 0x%02" PRIX32, register_data.page);
    err = mac->write_phy_reg(mac, this->phy_addr_, eth_phy_psr_reg_addr, register_data.page);
    ESPHL_ERROR_CHECK(err, "Select PHY Register page failed");
  }
 
  ESP_LOGD(TAG, "Writing to PHY Register Address: 0x%02" PRIX32, register_data.address);
  ESP_LOGD(TAG, "Writing to PHY Register Value: 0x%04" PRIX32, register_data.value);
  err = mac->write_phy_reg(mac, this->phy_addr_, register_data.address, register_data.value);
  ESPHL_ERROR_CHECK(err, "Writing PHY Register failed");
 
  if (this->type_ == ETHERNET_TYPE_RTL8201 && register_data.page) {
    ESP_LOGD(TAG, "Select PHY Register Page 0x00");
    err = mac->write_phy_reg(mac, this->phy_addr_, eth_phy_psr_reg_addr, 0x0);
    ESPHL_ERROR_CHECK(err, "Select PHY Register Page 0 failed");
  }
}
 
#endif
 
}  // namespace ethernet
}  // namespace esphome
 
#endif  // USE_ESP32