ethernet: esp_eth_stop API should stop emac hardware

components/esp_eth/include/esp_eth_mac.h

@@ -73,6 +73,30 @@ struct esp_eth_mac_s {
     */
     esp_err_t (*deinit)(esp_eth_mac_t *mac);
 
+    /**
+    * @brief Start Ethernet MAC
+    *
+    * @param[in] mac: Ethernet MAC instance
+    *
+    * @return
+    *      - ESP_OK: start Ethernet MAC successfully
+    *      - ESP_FAIL: start Ethernet MAC failed because some other error occurred
+    *
+    */
+    esp_err_t (*start)(esp_eth_mac_t *mac);
+
+    /**
+    * @brief Stop Ethernet MAC
+    *
+    * @param[in] mac: Ethernet MAC instance
+    *
+    * @return
+    *      - ESP_OK: stop Ethernet MAC successfully
+    *      - ESP_FAIL: stop Ethernet MAC failed because some error occurred
+    *
+    */
+    esp_err_t (*stop)(esp_eth_mac_t *mac);
+
     /**
     * @brief Transmit packet from Ethernet MAC
     *

components/esp_eth/src/esp_eth.c

@@ -267,6 +267,8 @@ esp_err_t esp_eth_stop(esp_eth_handle_t hdl)
     // check if driver has started
     if (eth_driver->flags & ESP_ETH_FLAGS_STARTED) {
         eth_driver->flags &= ~ESP_ETH_FLAGS_STARTED;
+        esp_eth_mac_t *mac = eth_driver->mac;
+        ETH_CHECK(mac->stop(mac) == ESP_OK, "stop mac failed", err, ESP_FAIL);
         ETH_CHECK(xTimerStop(eth_driver->check_link_timer, 0) == pdPASS,
                   "stop eth_link_timer failed", err, ESP_FAIL);
         ETH_CHECK(esp_event_post(ETH_EVENT, ETHERNET_EVENT_STOP, &eth_driver, sizeof(eth_driver), 0) == ESP_OK,

components/esp_eth/src/esp_eth_mac_dm9051.c

@@ -337,9 +337,10 @@ err:
 /**
  * @brief start dm9051: enable interrupt and start receive
  */
-static esp_err_t dm9051_start(emac_dm9051_t *emac)
+static esp_err_t emac_dm9051_start(esp_eth_mac_t *mac)
 {
     esp_err_t ret = ESP_OK;
+    emac_dm9051_t *emac = __containerof(mac, emac_dm9051_t, parent);
     /* enable interrupt */
     MAC_CHECK(dm9051_register_write(emac, DM9051_IMR, IMR_ALL) == ESP_OK, "write IMR failed", err, ESP_FAIL);
     /* enable rx */
@@ -355,9 +356,10 @@ err:
 /**
  * @brief stop dm9051: disable interrupt and stop receive
  */
-static esp_err_t dm9051_stop(emac_dm9051_t *emac)
+static esp_err_t emac_dm9051_stop(esp_eth_mac_t *mac)
 {
     esp_err_t ret = ESP_OK;
+    emac_dm9051_t *emac = __containerof(mac, emac_dm9051_t, parent);
     /* disable interrupt */
     MAC_CHECK(dm9051_register_write(emac, DM9051_IMR, 0x00) == ESP_OK, "write IMR failed", err, ESP_FAIL);
     /* disable rx */
@@ -519,11 +521,11 @@ static esp_err_t emac_dm9051_set_link(esp_eth_mac_t *mac, eth_link_t link)
     switch (link) {
     case ETH_LINK_UP:
         MAC_CHECK(nsr & NSR_LINKST, "phy is not link up", err, ESP_ERR_INVALID_STATE);
-        MAC_CHECK(dm9051_start(emac) == ESP_OK, "dm9051 start failed", err, ESP_FAIL);
+        MAC_CHECK(mac->start(mac) == ESP_OK, "dm9051 start failed", err, ESP_FAIL);
         break;
     case ETH_LINK_DOWN:
         MAC_CHECK(!(nsr & NSR_LINKST), "phy is not link down", err, ESP_ERR_INVALID_STATE);
-        MAC_CHECK(dm9051_stop(emac) == ESP_OK, "dm9051 stop failed", err, ESP_FAIL);
+        MAC_CHECK(mac->stop(mac) == ESP_OK, "dm9051 stop failed", err, ESP_FAIL);
         break;
     default:
         MAC_CHECK(false, "unknown link status", err, ESP_ERR_INVALID_ARG);
@@ -629,12 +631,12 @@ static esp_err_t emac_dm9051_receive(esp_eth_mac_t *mac, uint8_t *buf, uint32_t
     MAC_CHECK(dm9051_register_read(emac, DM9051_MRCMDX, &rxbyte) == ESP_OK, "read MRCMDX failed", err, ESP_FAIL);
     /* rxbyte must be 0xFF, 0 or 1 */
     if (rxbyte > 1) {
-        MAC_CHECK(dm9051_stop(emac) == ESP_OK, "stop dm9051 failed", err, ESP_FAIL);
+        MAC_CHECK(mac->stop(mac) == ESP_OK, "stop dm9051 failed", err, ESP_FAIL);
         /* reset rx fifo pointer */
         MAC_CHECK(dm9051_register_write(emac, DM9051_MPTRCR, MPTRCR_RST_RX) == ESP_OK,
                   "write MPTRCR failed", err, ESP_FAIL);
         ets_delay_us(10);
-        MAC_CHECK(dm9051_start(emac) == ESP_OK, "start dm9051 failed", err, ESP_FAIL);
+        MAC_CHECK(mac->start(mac) == ESP_OK, "start dm9051 failed", err, ESP_FAIL);
         MAC_CHECK(false, "reset rx fifo pointer", err, ESP_FAIL);
     } else if (rxbyte) {
         MAC_CHECK(dm9051_memory_peek(emac, (uint8_t *)&header, sizeof(header)) == ESP_OK,
@@ -698,7 +700,7 @@ static esp_err_t emac_dm9051_deinit(esp_eth_mac_t *mac)
 {
     emac_dm9051_t *emac = __containerof(mac, emac_dm9051_t, parent);
     esp_eth_mediator_t *eth = emac->eth;
-    dm9051_stop(emac);
+    mac->stop(mac);
     gpio_isr_handler_remove(emac->int_gpio_num);
     gpio_reset_pin(emac->int_gpio_num);
     eth->on_state_changed(eth, ETH_STATE_DEINIT, NULL);
@@ -731,6 +733,8 @@ esp_eth_mac_t *esp_eth_mac_new_dm9051(const eth_dm9051_config_t *dm9051_config,
     emac->parent.set_mediator = emac_dm9051_set_mediator;
     emac->parent.init = emac_dm9051_init;
     emac->parent.deinit = emac_dm9051_deinit;
+    emac->parent.start = emac_dm9051_start;
+    emac->parent.stop = emac_dm9051_stop;
     emac->parent.del = emac_dm9051_del;
     emac->parent.write_phy_reg = emac_dm9051_write_phy_reg;
     emac->parent.read_phy_reg = emac_dm9051_read_phy_reg;

components/esp_eth/src/esp_eth_mac_esp32.c

@@ -336,6 +336,20 @@ static esp_err_t emac_esp32_deinit(esp_eth_mac_t *mac)
     return ESP_OK;
 }
 
+static esp_err_t emac_esp32_start(esp_eth_mac_t *mac)
+{
+    emac_esp32_t *emac = __containerof(mac, emac_esp32_t, parent);
+    emac_hal_start(&emac->hal);
+    return ESP_OK;
+}
+
+static esp_err_t emac_esp32_stop(esp_eth_mac_t *mac)
+{
+    emac_esp32_t *emac = __containerof(mac, emac_esp32_t, parent);
+    emac_hal_stop(&emac->hal);
+    return ESP_OK;
+}
+
 static esp_err_t emac_esp32_del(esp_eth_mac_t *mac)
 {
     emac_esp32_t *emac = __containerof(mac, emac_esp32_t, parent);
@@ -410,6 +424,8 @@ esp_eth_mac_t *esp_eth_mac_new_esp32(const eth_mac_config_t *config)
     emac->parent.set_mediator = emac_esp32_set_mediator;
     emac->parent.init = emac_esp32_init;
     emac->parent.deinit = emac_esp32_deinit;
+    emac->parent.start = emac_esp32_start;
+    emac->parent.stop = emac_esp32_stop;
     emac->parent.del = emac_esp32_del;
     emac->parent.write_phy_reg = emac_esp32_write_phy_reg;
     emac->parent.read_phy_reg = emac_esp32_read_phy_reg;

components/esp_eth/src/esp_eth_mac_openeth.c

@@ -319,6 +319,18 @@ static esp_err_t emac_opencores_deinit(esp_eth_mac_t *mac)
     return ESP_OK;
 }
 
+static esp_err_t emac_opencores_start(esp_eth_mac_t *mac)
+{
+    openeth_enable();
+    return ESP_OK;
+}
+
+static esp_err_t emac_opencores_stop(esp_eth_mac_t *mac)
+{
+    openeth_disable();
+    return ESP_OK;
+}
+
 static esp_err_t emac_opencores_del(esp_eth_mac_t *mac)
 {
     emac_opencores_t *emac = __containerof(mac, emac_opencores_t, parent);
@@ -366,6 +378,8 @@ esp_eth_mac_t *esp_eth_mac_new_openeth(const eth_mac_config_t *config)
     emac->parent.set_mediator = emac_opencores_set_mediator;
     emac->parent.init = emac_opencores_init;
     emac->parent.deinit = emac_opencores_deinit;
+    emac->parent.start = emac_opencores_start;
+    emac->parent.stop = emac_opencores_stop;
     emac->parent.del = emac_opencores_del;
     emac->parent.write_phy_reg = emac_opencores_write_phy_reg;
     emac->parent.read_phy_reg = emac_opencores_read_phy_reg;

components/esp_eth/src/esp_eth_phy_dm9051.c

@@ -94,6 +94,11 @@ static esp_err_t dm9051_update_link_duplex_speed(phy_dm9051_t *dm9051)
     eth_duplex_t duplex = ETH_DUPLEX_HALF;
     bmsr_reg_t bmsr;
     dscsr_reg_t dscsr;
+    // BMSR is a latch low register
+    // after power up, the first latched value must be 0, which means down
+    // to speed up power up link speed, double read this register as a workaround
+    PHY_CHECK(eth->phy_reg_read(eth, dm9051->addr, ETH_PHY_BMSR_REG_ADDR, &(bmsr.val)) == ESP_OK,
+              "read BMSR failed", err);
     PHY_CHECK(eth->phy_reg_read(eth, dm9051->addr, ETH_PHY_BMSR_REG_ADDR, &(bmsr.val)) == ESP_OK,
               "read BMSR failed", err);
     eth_link_t link = bmsr.link_status ? ETH_LINK_UP : ETH_LINK_DOWN;