ethernet: remove CONFIG_ETHERNET

1. Hello World application shows no footprint difference before and
after this change
2. examples/ethernet/ethernet application compiles properly (can't
test with my board)

components/esp32/event_default_handlers.c

@@ -56,46 +56,17 @@ static esp_err_t system_event_sta_connected_handle_default(system_event_t *event
 static esp_err_t system_event_sta_disconnected_handle_default(system_event_t *event);
 static esp_err_t system_event_sta_got_ip_default(system_event_t *event);
 
-#ifdef CONFIG_ETHERNET
 static esp_err_t system_event_eth_start_handle_default(system_event_t *event);
 static esp_err_t system_event_eth_stop_handle_default(system_event_t *event);
 static esp_err_t system_event_eth_connected_handle_default(system_event_t *event);
 static esp_err_t system_event_eth_disconnected_handle_default(system_event_t *event);
-#endif
 
 /* Default event handler functions
 
    Any entry in this table which is disabled by config will have a NULL handler.
 */
-static system_event_handler_t default_event_handlers[SYSTEM_EVENT_MAX] = {
+static system_event_handler_t default_event_handlers[SYSTEM_EVENT_MAX] = { 0 };
-    [SYSTEM_EVENT_WIFI_READY]          = NULL,
-    [SYSTEM_EVENT_SCAN_DONE]           = NULL,
-    [SYSTEM_EVENT_STA_START]           = NULL,
-    [SYSTEM_EVENT_STA_STOP]            = NULL,
-    [SYSTEM_EVENT_STA_CONNECTED]       = NULL,
-    [SYSTEM_EVENT_STA_DISCONNECTED]    = NULL,
-    [SYSTEM_EVENT_STA_AUTHMODE_CHANGE] = NULL,
-    [SYSTEM_EVENT_STA_GOT_IP]          = NULL,
-    [SYSTEM_EVENT_STA_WPS_ER_SUCCESS]  = NULL,
-    [SYSTEM_EVENT_STA_WPS_ER_FAILED]   = NULL,
-    [SYSTEM_EVENT_STA_WPS_ER_TIMEOUT]  = NULL,
-    [SYSTEM_EVENT_STA_WPS_ER_PIN]      = NULL,
-    [SYSTEM_EVENT_AP_START]            = NULL,
-    [SYSTEM_EVENT_AP_STOP]             = NULL,
-    [SYSTEM_EVENT_AP_STACONNECTED]     = NULL,
-    [SYSTEM_EVENT_AP_STADISCONNECTED]  = NULL,
-    [SYSTEM_EVENT_AP_PROBEREQRECVED]   = NULL,
-    [SYSTEM_EVENT_AP_STA_GOT_IP6]      = NULL,
-#ifdef CONFIG_ETHERNET
-    [SYSTEM_EVENT_ETH_START]           = system_event_eth_start_handle_default,
-    [SYSTEM_EVENT_ETH_STOP]            = system_event_eth_stop_handle_default,
-    [SYSTEM_EVENT_ETH_CONNECTED]       = system_event_eth_connected_handle_default,
-    [SYSTEM_EVENT_ETH_DISCONNECTED]    = system_event_eth_disconnected_handle_default,
-    [SYSTEM_EVENT_ETH_GOT_IP]          = NULL,
-#endif
-};
 
-#ifdef CONFIG_ETHERNET
 esp_err_t system_event_eth_start_handle_default(system_event_t *event)
 {
     tcpip_adapter_ip_info_t eth_ip;
@@ -151,7 +122,6 @@ esp_err_t system_event_eth_disconnected_handle_default(system_event_t *event)
     tcpip_adapter_down(TCPIP_ADAPTER_IF_ETH);
     return ESP_OK;
 }
-#endif
 
 static esp_err_t system_event_sta_got_ip_default(system_event_t *event)
 {
@@ -417,3 +387,11 @@ esp_err_t esp_wifi_init(wifi_init_config_t *config)
      esp_register_shutdown_handler((shutdown_handler_t)esp_wifi_stop);
      return esp_wifi_init_internal(config);
 }
+
+void esp_event_set_default_eth_handlers()
+{
+     default_event_handlers[SYSTEM_EVENT_ETH_START]           = system_event_eth_start_handle_default;
+     default_event_handlers[SYSTEM_EVENT_ETH_STOP]            = system_event_eth_stop_handle_default;
+     default_event_handlers[SYSTEM_EVENT_ETH_CONNECTED]       = system_event_eth_connected_handle_default;
+     default_event_handlers[SYSTEM_EVENT_ETH_DISCONNECTED]    = system_event_eth_disconnected_handle_default;
+}

components/esp32/include/esp_event.h

@@ -159,6 +159,11 @@ esp_err_t esp_event_send(system_event_t *event);
   */
 esp_err_t esp_event_process_default(system_event_t *event);
 
+/**
+  * @brief  Install default event handlers for Ethernet interface
+  *
+  */
+void esp_event_set_default_eth_handlers();
 
 #ifdef __cplusplus
 }

components/ethernet/Kconfig

@@ -1,14 +1,9 @@
-menuconfig ETHERNET
+menu ETHERNET
-    bool "Ethernet"
-    default n
-    help
-        Select this option to enable ethernet driver and show the submenu with ethernet features.
 
 config DMA_RX_BUF_NUM
     int "Number of DMA RX buffers"
     range 3 20
     default 10
-    depends on ETHERNET
     help
         Number of DMA receive buffers. Each buffer is 1600 bytes.
         Buffers are allocated statically.
@@ -19,7 +14,6 @@ config DMA_TX_BUF_NUM
     int "Number of DMA RX buffers"
     range 3 20
     default 10
-    depends on ETHERNET
     help
         Number of DMA transmit buffers. Each buffer is 1600 bytes.
         Buffers are allocated statically.
@@ -28,7 +22,6 @@ config DMA_TX_BUF_NUM
 config EMAC_L2_TO_L3_RX_BUF_MODE
     bool "Enable copy between Layer2 and Layer3"
     default n
-    depends on ETHERNET
     help
         If this options is selected, a copy of each received buffer will be created when
         passing it from the Ethernet MAC (L2) to the IP stack (L3). Otherwise, IP stack
@@ -46,7 +39,7 @@ config EMAC_TASK_PRIORITY
     int "EMAC_TASK_PRIORITY"
     default 20
     range 3 22
-    depends on ETHERNET
     help
         Ethernet MAC task priority.
 
+endmenu

components/ethernet/emac_common.h

@@ -101,15 +101,11 @@ struct emac_open_cmd {
 struct emac_close_cmd {
     int8_t err;
 };
-#if CONFIG_ETHERNET
+
 #define DMA_RX_BUF_NUM CONFIG_DMA_RX_BUF_NUM
 #define DMA_TX_BUF_NUM CONFIG_DMA_TX_BUF_NUM
 #define EMAC_TASK_PRIORITY CONFIG_EMAC_TASK_PRIORITY
-#else
+
-#define DMA_RX_BUF_NUM 1
-#define DMA_TX_BUF_NUM 1
-#define EMAC_TASK_PRIORITY 10
-#endif
 #define DMA_RX_BUF_SIZE 1600
 #define DMA_TX_BUF_SIZE 1600
 

components/ethernet/emac_main.c

@@ -978,13 +978,14 @@ esp_err_t IRAM_ATTR emac_post(emac_sig_t sig, emac_par_t par)
 }
 
 esp_err_t esp_eth_init(eth_config_t *config)
+{
+     esp_event_set_default_eth_handlers();
+     return esp_eth_init_internal(config);
+}
+
+esp_err_t esp_eth_init_internal(eth_config_t *config)
 {
     esp_err_t ret = ESP_OK;
-#if !CONFIG_ETHERNET
-    ESP_LOGI(TAG, "eth driver init fail,please make menuconfig and enable ethernet .");
-    ret = ESP_FAIL;
-    goto _exit;
-#endif
     if (emac_config.emac_status != EMAC_RUNTIME_NOT_INIT) {
         goto _exit;
     }

components/ethernet/include/esp_eth.h

@@ -117,6 +117,24 @@ typedef struct {
  */
 esp_err_t esp_eth_init(eth_config_t *config);
 
+/**
+ * @brief  Init Ethernet mac driver only
+ *
+ * For the most part, you need not call this function directly. It gets called
+ * from esp_eth_init().
+ *
+ * This function may be called, if you only need to initialize the Ethernet
+ * driver without having to use the network stack on top.
+ *
+ * @note   config can not be NULL,and phy chip must be suitable to phy init func.
+ * @param[in] config  mac init data.
+ *
+ * @return
+ *      - ESP_OK
+ *      - ESP_FAIL
+ */
+esp_err_t esp_eth_init_internal(eth_config_t *config);
+
 /**
  * @brief  Send packet from tcp/ip to mac
  *

examples/ethernet/ethernet/sdkconfig.defaults

@@ -1 +1 @@
-CONFIG_ETHERNET=y
+

tools/unit-test-app/sdkconfig

@@ -191,7 +191,6 @@ CONFIG_ESP32_PHY_CALIBRATION_AND_DATA_STORAGE=y
 # CONFIG_ESP32_PHY_INIT_DATA_IN_PARTITION is not set
 CONFIG_ESP32_PHY_MAX_WIFI_TX_POWER=20
 CONFIG_ESP32_PHY_MAX_TX_POWER=20
-# CONFIG_ETHERNET is not set
 
 #
 # FAT Filesystem support