Merge branch 'feature/ethernet_phy_ksz8081' into 'master'

Ethernet phy driver: ksz8081

Closes IDFGH-4775

See merge request espressif/esp-idf!12723

components/esp_eth/CMakeLists.txt

@@ -22,7 +22,7 @@ if(CONFIG_ETH_ENABLED)
         list(APPEND srcs "src/esp_eth_mac_esp32.c"
                          "src/esp_eth_phy_dp83848.c"
                          "src/esp_eth_phy_ip101.c"
-                         "src/esp_eth_phy_ksz8041.c"
+                         "src/esp_eth_phy_ksz80xx.c"
                          "src/esp_eth_phy_lan8720.c"
                          "src/esp_eth_phy_rtl8201.c")
     endif()

components/esp_eth/include/esp_eth_phy.h

@@ -264,6 +264,17 @@ esp_eth_phy_t *esp_eth_phy_new_dp83848(const eth_phy_config_t *config);
 */
 esp_eth_phy_t *esp_eth_phy_new_ksz8041(const eth_phy_config_t *config);
 
+/**
+* @brief Create a PHY instance of KSZ8081
+*
+* @param[in] config: configuration of PHY
+*
+* @return
+*      - instance: create PHY instance successfully
+*      - NULL: create PHY instance failed because some error occurred
+*/
+esp_eth_phy_t *esp_eth_phy_new_ksz8081(const eth_phy_config_t *config);
+
 #if CONFIG_ETH_SPI_ETHERNET_DM9051
 /**
 * @brief Create a PHY instance of DM9051

components/esp_eth/src/esp_eth_phy_ksz8041.c

@@ -1,369 +0,0 @@
-// Copyright 2019 Espressif Systems (Shanghai) PTE LTD
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-#include <string.h>
-#include <stdlib.h>
-#include <sys/cdefs.h>
-#include "esp_log.h"
-#include "esp_eth.h"
-#include "eth_phy_regs_struct.h"
-#include "freertos/FreeRTOS.h"
-#include "freertos/task.h"
-#include "driver/gpio.h"
-#include "esp_rom_gpio.h"
-#include "esp_rom_sys.h"
-
-static const char *TAG = "ksz8041";
-#define PHY_CHECK(a, str, goto_tag, ...)                                          \
-    do                                                                            \
-    {                                                                             \
-        if (!(a))                                                                 \
-        {                                                                         \
-            ESP_LOGE(TAG, "%s(%d): " str, __FUNCTION__, __LINE__, ##__VA_ARGS__); \
-            goto goto_tag;                                                        \
-        }                                                                         \
-    } while (0)
-
-/***************Vendor Specific Register***************/
-/**
- * @brief PC2R(PHY Control 2 Register)
- *
- */
-typedef union {
-    struct {
-        uint32_t hp_mdix : 1;          /* HP Auto MDI/MDI-X Mode */
-        uint32_t mdi_x_select : 1;     /* MDI/MDI-X Select */
-        uint32_t pairswap_dis : 1;     /* Disable Auto MDI/MDI-X */
-        uint32_t energy_det : 1;       /* Presence of Signal on RX+/- Wire Pair */
-        uint32_t force_link : 1;       /* Force Link Pass */
-        uint32_t power_saving : 1;     /* Enable Powering Saving */
-        uint32_t irq_level : 1;        /* Interrupt Pin Active Level */
-        uint32_t jabber : 1;           /* Enable Jabber Counter */
-        uint32_t auto_nego_comp : 1;   /* Auto Negotiation Complete */
-        uint32_t flow_ctl_cap : 1;     /* Flow Control Capable */
-        uint32_t phy_iso : 1;          /* PHY in Isolate Mode */
-        uint32_t op_mode_ind : 3;      /* Operation Mode Indication */
-        uint32_t en_sqe_test : 1;      /* Enable SQE Test */
-        uint32_t dis_data_scr: 1;      /* Disable Scrambler */
-    };
-    uint32_t val;
-} pc2r_reg_t;
-#define ETH_PHY_PC2R_REG_ADDR (0x1F)
-
-typedef struct {
-    esp_eth_phy_t parent;
-    esp_eth_mediator_t *eth;
-    int addr;
-    uint32_t reset_timeout_ms;
-    uint32_t autonego_timeout_ms;
-    eth_link_t link_status;
-    int reset_gpio_num;
-} phy_ksz8041_t;
-
-static esp_err_t ksz8041_update_link_duplex_speed(phy_ksz8041_t *ksz8041)
-{
-    esp_eth_mediator_t *eth = ksz8041->eth;
-    eth_speed_t speed = ETH_SPEED_10M;
-    eth_duplex_t duplex = ETH_DUPLEX_HALF;
-    uint32_t peer_pause_ability = false;
-    anlpar_reg_t anlpar;
-    bmsr_reg_t bmsr;
-    pc2r_reg_t pc2r;
-    PHY_CHECK(eth->phy_reg_read(eth, ksz8041->addr, ETH_PHY_ANLPAR_REG_ADDR, &(anlpar.val)) == ESP_OK,
-              "read ANLPAR failed", err);
-    PHY_CHECK(eth->phy_reg_read(eth, ksz8041->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;
-    /* check if link status changed */
-    if (ksz8041->link_status != link) {
-        /* when link up, read negotiation result */
-        if (link == ETH_LINK_UP) {
-            PHY_CHECK(eth->phy_reg_read(eth, ksz8041->addr, ETH_PHY_PC2R_REG_ADDR, &(pc2r.val)) == ESP_OK,
-                      "read PC2R failed", err);
-            switch (pc2r.op_mode_ind) {
-            case 1: //10Base-T half-duplex
-                speed = ETH_SPEED_10M;
-                duplex = ETH_DUPLEX_HALF;
-                break;
-            case 2: //100Base-TX half-duplex
-                speed = ETH_SPEED_100M;
-                duplex = ETH_DUPLEX_HALF;
-                break;
-            case 5: //10Base-T full-duplex
-                speed = ETH_SPEED_10M;
-                duplex = ETH_DUPLEX_FULL;
-                break;
-            case 6: //100Base-TX full-duplex
-                speed = ETH_SPEED_100M;
-                duplex = ETH_DUPLEX_FULL;
-                break;
-            default:
-                break;
-            }
-            PHY_CHECK(eth->on_state_changed(eth, ETH_STATE_SPEED, (void *)speed) == ESP_OK,
-                      "change speed failed", err);
-            PHY_CHECK(eth->on_state_changed(eth, ETH_STATE_DUPLEX, (void *)duplex) == ESP_OK,
-                      "change duplex failed", err);
-            /* if we're in duplex mode, and peer has the flow control ability */
-            if (duplex == ETH_DUPLEX_FULL && anlpar.symmetric_pause) {
-                peer_pause_ability = 1;
-            } else {
-                peer_pause_ability = 0;
-            }
-            PHY_CHECK(eth->on_state_changed(eth, ETH_STATE_PAUSE, (void *)peer_pause_ability) == ESP_OK,
-                      "change pause ability failed", err);
-        }
-        PHY_CHECK(eth->on_state_changed(eth, ETH_STATE_LINK, (void *)link) == ESP_OK,
-                  "change link failed", err);
-        ksz8041->link_status = link;
-    }
-    return ESP_OK;
-err:
-    return ESP_FAIL;
-}
-
-static esp_err_t ksz8041_set_mediator(esp_eth_phy_t *phy, esp_eth_mediator_t *eth)
-{
-    PHY_CHECK(eth, "can't set mediator to null", err);
-    phy_ksz8041_t *ksz8041 = __containerof(phy, phy_ksz8041_t, parent);
-    ksz8041->eth = eth;
-    return ESP_OK;
-err:
-    return ESP_ERR_INVALID_ARG;
-}
-
-static esp_err_t ksz8041_get_link(esp_eth_phy_t *phy)
-{
-    phy_ksz8041_t *ksz8041 = __containerof(phy, phy_ksz8041_t, parent);
-    /* Update information about link, speed, duplex */
-    PHY_CHECK(ksz8041_update_link_duplex_speed(ksz8041) == ESP_OK, "update link duplex speed failed", err);
-    return ESP_OK;
-err:
-    return ESP_FAIL;
-}
-
-static esp_err_t ksz8041_reset(esp_eth_phy_t *phy)
-{
-    phy_ksz8041_t *ksz8041 = __containerof(phy, phy_ksz8041_t, parent);
-    ksz8041->link_status = ETH_LINK_DOWN;
-    esp_eth_mediator_t *eth = ksz8041->eth;
-    bmcr_reg_t bmcr = {.reset = 1};
-    PHY_CHECK(eth->phy_reg_write(eth, ksz8041->addr, ETH_PHY_BMCR_REG_ADDR, bmcr.val) == ESP_OK,
-              "write BMCR failed", err);
-    /* wait for reset complete */
-    uint32_t to = 0;
-    for (to = 0; to < ksz8041->reset_timeout_ms / 10; to++) {
-        vTaskDelay(pdMS_TO_TICKS(10));
-        PHY_CHECK(eth->phy_reg_read(eth, ksz8041->addr, ETH_PHY_BMCR_REG_ADDR, &(bmcr.val)) == ESP_OK,
-                  "read BMCR failed", err);
-        if (!bmcr.reset) {
-            break;
-        }
-    }
-    PHY_CHECK(to < ksz8041->reset_timeout_ms / 10, "reset timeout", err);
-    return ESP_OK;
-err:
-    return ESP_FAIL;
-}
-
-static esp_err_t ksz8041_reset_hw(esp_eth_phy_t *phy)
-{
-    phy_ksz8041_t *ksz8041 = __containerof(phy, phy_ksz8041_t, parent);
-    if (ksz8041->reset_gpio_num >= 0) {
-        esp_rom_gpio_pad_select_gpio(ksz8041->reset_gpio_num);
-        gpio_set_direction(ksz8041->reset_gpio_num, GPIO_MODE_OUTPUT);
-        gpio_set_level(ksz8041->reset_gpio_num, 0);
-        esp_rom_delay_us(100); // insert min input assert time
-        gpio_set_level(ksz8041->reset_gpio_num, 1);
-    }
-    return ESP_OK;
-}
-
-static esp_err_t ksz8041_negotiate(esp_eth_phy_t *phy)
-{
-    phy_ksz8041_t *ksz8041 = __containerof(phy, phy_ksz8041_t, parent);
-    esp_eth_mediator_t *eth = ksz8041->eth;
-    /* Restart auto negotiation */
-    bmcr_reg_t bmcr = {
-        .speed_select = 1,     /* 100Mbps */
-        .duplex_mode = 1,      /* Full Duplex */
-        .en_auto_nego = 1,     /* Auto Negotiation */
-        .restart_auto_nego = 1 /* Restart Auto Negotiation */
-    };
-    PHY_CHECK(eth->phy_reg_write(eth, ksz8041->addr, ETH_PHY_BMCR_REG_ADDR, bmcr.val) == ESP_OK, "write BMCR failed", err);
-    /* Wait for auto negotiation complete */
-    bmsr_reg_t bmsr;
-    pc2r_reg_t pc2r;
-    uint32_t to = 0;
-    for (to = 0; to < ksz8041->autonego_timeout_ms / 10; to++) {
-        vTaskDelay(pdMS_TO_TICKS(10));
-        PHY_CHECK(eth->phy_reg_read(eth, ksz8041->addr, ETH_PHY_BMSR_REG_ADDR, &(bmsr.val)) == ESP_OK,
-                  "read BMSR failed", err);
-        PHY_CHECK(eth->phy_reg_read(eth, ksz8041->addr, ETH_PHY_PC2R_REG_ADDR, &(pc2r.val)) == ESP_OK,
-                  "read PC2R failed", err);
-        if (bmsr.auto_nego_complete && pc2r.auto_nego_comp) {
-            break;
-        }
-    }
-    /* Auto negotiation failed, maybe no network cable plugged in, so output a warning */
-    if (to >= ksz8041->autonego_timeout_ms / 10) {
-        ESP_LOGW(TAG, "auto negotiation timeout");
-    }
-    /* Updata information about link, speed, duplex */
-    PHY_CHECK(ksz8041_update_link_duplex_speed(ksz8041) == ESP_OK, "update link duplex speed failed", err);
-    return ESP_OK;
-err:
-    return ESP_FAIL;
-}
-
-static esp_err_t ksz8041_pwrctl(esp_eth_phy_t *phy, bool enable)
-{
-    phy_ksz8041_t *ksz8041 = __containerof(phy, phy_ksz8041_t, parent);
-    esp_eth_mediator_t *eth = ksz8041->eth;
-    bmcr_reg_t bmcr;
-    PHY_CHECK(eth->phy_reg_read(eth, ksz8041->addr, ETH_PHY_BMCR_REG_ADDR, &(bmcr.val)) == ESP_OK,
-              "read BMCR failed", err);
-    if (!enable) {
-        /* General Power Down Mode */
-        bmcr.power_down = 1;
-    } else {
-        /* Normal operation Mode */
-        bmcr.power_down = 0;
-    }
-    PHY_CHECK(eth->phy_reg_write(eth, ksz8041->addr, ETH_PHY_BMCR_REG_ADDR, bmcr.val) == ESP_OK,
-              "write BMCR failed", err);
-    if (!enable) {
-        PHY_CHECK(eth->phy_reg_read(eth, ksz8041->addr, ETH_PHY_BMCR_REG_ADDR, &(bmcr.val)) == ESP_OK,
-                  "read BMCR failed", err);
-        PHY_CHECK(bmcr.power_down == 1, "power down failed", err);
-    } else {
-        /* wait for power up complete */
-        uint32_t to = 0;
-        for (to = 0; to < ksz8041->reset_timeout_ms / 10; to++) {
-            vTaskDelay(pdMS_TO_TICKS(10));
-            PHY_CHECK(eth->phy_reg_read(eth, ksz8041->addr, ETH_PHY_BMCR_REG_ADDR, &(bmcr.val)) == ESP_OK,
-                      "read BMCR failed", err);
-            if (bmcr.power_down == 0) {
-                break;
-            }
-        }
-        PHY_CHECK(to < ksz8041->reset_timeout_ms / 10, "power up timeout", err);
-    }
-    return ESP_OK;
-err:
-    return ESP_FAIL;
-}
-
-static esp_err_t ksz8041_set_addr(esp_eth_phy_t *phy, uint32_t addr)
-{
-    phy_ksz8041_t *ksz8041 = __containerof(phy, phy_ksz8041_t, parent);
-    ksz8041->addr = addr;
-    return ESP_OK;
-}
-
-static esp_err_t ksz8041_get_addr(esp_eth_phy_t *phy, uint32_t *addr)
-{
-    PHY_CHECK(addr, "addr can't be null", err);
-    phy_ksz8041_t *ksz8041 = __containerof(phy, phy_ksz8041_t, parent);
-    *addr = ksz8041->addr;
-    return ESP_OK;
-err:
-    return ESP_ERR_INVALID_ARG;
-}
-
-static esp_err_t ksz8041_del(esp_eth_phy_t *phy)
-{
-    phy_ksz8041_t *ksz8041 = __containerof(phy, phy_ksz8041_t, parent);
-    free(ksz8041);
-    return ESP_OK;
-}
-
-static esp_err_t ksz8041_advertise_pause_ability(esp_eth_phy_t *phy, uint32_t ability)
-{
-    phy_ksz8041_t *ksz8041 = __containerof(phy, phy_ksz8041_t, parent);
-    esp_eth_mediator_t *eth = ksz8041->eth;
-    /* Set PAUSE function ability */
-    anar_reg_t anar;
-    PHY_CHECK(eth->phy_reg_read(eth, ksz8041->addr, ETH_PHY_ANAR_REG_ADDR, &(anar.val)) == ESP_OK,
-              "read ANAR failed", err);
-    if (ability) {
-        anar.asymmetric_pause = 1;
-        anar.symmetric_pause = 1;
-    } else {
-        anar.asymmetric_pause = 0;
-        anar.symmetric_pause = 0;
-    }
-    PHY_CHECK(eth->phy_reg_write(eth, ksz8041->addr, ETH_PHY_ANAR_REG_ADDR, anar.val) == ESP_OK,
-              "write ANAR failed", err);
-    return ESP_OK;
-err:
-    return ESP_FAIL;
-}
-
-static esp_err_t ksz8041_init(esp_eth_phy_t *phy)
-{
-    phy_ksz8041_t *ksz8041 = __containerof(phy, phy_ksz8041_t, parent);
-    esp_eth_mediator_t *eth = ksz8041->eth;
-    /* Power on Ethernet PHY */
-    PHY_CHECK(ksz8041_pwrctl(phy, true) == ESP_OK, "power control failed", err);
-    /* Reset Ethernet PHY */
-    PHY_CHECK(ksz8041_reset(phy) == ESP_OK, "reset failed", err);
-    /* Check PHY ID */
-    phyidr1_reg_t id1;
-    phyidr2_reg_t id2;
-    PHY_CHECK(eth->phy_reg_read(eth, ksz8041->addr, ETH_PHY_IDR1_REG_ADDR, &(id1.val)) == ESP_OK,
-              "read ID1 failed", err);
-    PHY_CHECK(eth->phy_reg_read(eth, ksz8041->addr, ETH_PHY_IDR2_REG_ADDR, &(id2.val)) == ESP_OK,
-              "read ID2 failed", err);
-    PHY_CHECK(id1.oui_msb == 0x22 && id2.oui_lsb == 0x5 && id2.vendor_model == 0x11, "wrong chip ID", err);
-    return ESP_OK;
-err:
-    return ESP_FAIL;
-}
-
-static esp_err_t ksz8041_deinit(esp_eth_phy_t *phy)
-{
-    /* Power off Ethernet PHY */
-    PHY_CHECK(ksz8041_pwrctl(phy, false) == ESP_OK, "power control failed", err);
-    return ESP_OK;
-err:
-    return ESP_FAIL;
-}
-
-esp_eth_phy_t *esp_eth_phy_new_ksz8041(const eth_phy_config_t *config)
-{
-    PHY_CHECK(config, "can't set phy config to null", err);
-    phy_ksz8041_t *ksz8041 = calloc(1, sizeof(phy_ksz8041_t));
-    PHY_CHECK(ksz8041, "calloc ksz8041 failed", err);
-    ksz8041->addr = config->phy_addr;
-    ksz8041->reset_gpio_num = config->reset_gpio_num;
-    ksz8041->reset_timeout_ms = config->reset_timeout_ms;
-    ksz8041->link_status = ETH_LINK_DOWN;
-    ksz8041->autonego_timeout_ms = config->autonego_timeout_ms;
-    ksz8041->parent.reset = ksz8041_reset;
-    ksz8041->parent.reset_hw = ksz8041_reset_hw;
-    ksz8041->parent.init = ksz8041_init;
-    ksz8041->parent.deinit = ksz8041_deinit;
-    ksz8041->parent.set_mediator = ksz8041_set_mediator;
-    ksz8041->parent.negotiate = ksz8041_negotiate;
-    ksz8041->parent.get_link = ksz8041_get_link;
-    ksz8041->parent.pwrctl = ksz8041_pwrctl;
-    ksz8041->parent.get_addr = ksz8041_get_addr;
-    ksz8041->parent.set_addr = ksz8041_set_addr;
-    ksz8041->parent.advertise_pause_ability = ksz8041_advertise_pause_ability;
-    ksz8041->parent.del = ksz8041_del;
-
-    return &(ksz8041->parent);
-err:
-    return NULL;
-}

components/esp_eth/src/esp_eth_phy_ksz80xx.c

@@ -0,0 +1,428 @@
+// Copyright 2019-2021 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+#include <string.h>
+#include <stdlib.h>
+#include <sys/cdefs.h>
+#include "esp_log.h"
+#include "esp_eth.h"
+#include "eth_phy_regs_struct.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "driver/gpio.h"
+#include "esp_rom_gpio.h"
+#include "esp_rom_sys.h"
+
+static const char *TAG = "ksz80xx";
+#define PHY_CHECK(a, str, goto_tag, ...)                                          \
+    do {                                                                          \
+        if (!(a))                                                                 \
+        {                                                                         \
+            ESP_LOGE(TAG, "%s(%d): " str, __FUNCTION__, __LINE__, ##__VA_ARGS__); \
+            goto goto_tag;                                                        \
+        }                                                                         \
+    } while (0)
+
+#define KSZ8041_MODEL_ID (0x11)
+#define KSZ8081_MODEL_ID (0x16)
+
+/***************Vendor Specific Register***************/
+/**
+ * @brief PC2R(PHY Control 2 Register) for KSZ8041
+ *
+ */
+typedef union {
+    struct {
+        uint32_t dis_data_scr: 1;    /* Disable Scrambler */
+        uint32_t en_sqe_test : 1;    /* Enable SQE Test */
+        uint32_t op_mode : 3;        /* Operation Mode */
+        uint32_t phy_iso : 1;        /* PHY Isolate */
+        uint32_t en_flow_ctrl : 1;   /* Enable Flow Control */
+        uint32_t auto_nego_comp : 1; /* Auto Negotiation Complete */
+        uint32_t en_jabber : 1;      /* Enable Jabber Counter */
+        uint32_t irq_level : 1;      /* Interrupt Pin Active Level */
+        uint32_t power_saving : 1;   /* Enable Powering Saving */
+        uint32_t force_link : 1;     /* Force Link Pass */
+        uint32_t energy_det : 1;     /* Presence of Signal on RX+/- Wire Pair */
+        uint32_t pairswap_dis : 1;   /* Disable Auto MDI/MDI-X */
+        uint32_t mdix_select : 1;    /* MDI/MDI-X Select */
+        uint32_t hp_mdix : 1;        /* HP Auto MDI/MDI-X Mode */
+    };
+    uint32_t val;
+} ksz8041_pc2r_reg_t;
+#define KSZ8041_PC2R_ERG_ADDR (0x1F)
+
+/**
+ * @brief PC1R(PHY Control 1 Register) for KSZ8081
+ *
+ */
+typedef union {
+    struct {
+        uint32_t op_mode : 3;         /* Operation Mode Indication */
+        uint32_t phy_iso : 1;         /* PHY in Isolate Mode */
+        uint32_t energy_det: 1;       /* Signal presence on RX pair */
+        uint32_t mdix_state : 1;      /* MDI/MDI-X state */
+        uint32_t reserved_6 : 1;      /* Reserved */
+        uint32_t polarity_status : 1; /* Polarity status */
+        uint32_t link_status : 1;     /* Link status */
+        uint32_t en_flow_ctrl : 1;    /* Flow control */
+        uint32_t reserved_15_10 : 6;  /* Reserved */
+    };
+    uint32_t val;
+} ksz8081_pc1r_reg_t;
+#define KSZ8081_PC1R_REG_ADDR (0x1E)
+
+typedef struct {
+    esp_eth_phy_t parent;
+    esp_eth_mediator_t *eth;
+    int addr;
+    uint32_t reset_timeout_ms;
+    uint32_t autonego_timeout_ms;
+    eth_link_t link_status;
+    int reset_gpio_num;
+    int vendor_model;
+} phy_ksz80xx_t;
+
+static esp_err_t ksz80xx_update_link_duplex_speed(phy_ksz80xx_t *ksz80xx)
+{
+    esp_eth_mediator_t *eth = ksz80xx->eth;
+    eth_speed_t speed = ETH_SPEED_10M;
+    eth_duplex_t duplex = ETH_DUPLEX_HALF;
+    uint32_t peer_pause_ability = false;
+    anlpar_reg_t anlpar;
+    bmsr_reg_t bmsr;
+    PHY_CHECK(eth->phy_reg_read(eth, ksz80xx->addr, ETH_PHY_ANLPAR_REG_ADDR, &(anlpar.val)) == ESP_OK,
+              "read ANLPAR failed", err);
+    PHY_CHECK(eth->phy_reg_read(eth, ksz80xx->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;
+    /* check if link status changed */
+    if (ksz80xx->link_status != link) {
+        /* when link up, read negotiation result */
+        if (link == ETH_LINK_UP) {
+            int op_mode = 0;
+            if (ksz80xx->vendor_model == KSZ8041_MODEL_ID) {
+                ksz8041_pc2r_reg_t pc2r;
+                PHY_CHECK(eth->phy_reg_read(eth, ksz80xx->addr, KSZ8041_PC2R_ERG_ADDR, &(pc2r.val)) == ESP_OK,
+                          "read PC2R failed", err);
+                op_mode = pc2r.op_mode;
+            } else if (ksz80xx->vendor_model == KSZ8081_MODEL_ID) {
+                ksz8081_pc1r_reg_t pc1r;
+                PHY_CHECK(eth->phy_reg_read(eth, ksz80xx->addr, KSZ8081_PC1R_REG_ADDR, &(pc1r.val)) == ESP_OK,
+                          "read PC1R failed", err);
+                op_mode = pc1r.op_mode;
+            }
+            switch (op_mode) {
+            case 1: //10Base-T half-duplex
+                speed = ETH_SPEED_10M;
+                duplex = ETH_DUPLEX_HALF;
+                break;
+            case 2: //100Base-TX half-duplex
+                speed = ETH_SPEED_100M;
+                duplex = ETH_DUPLEX_HALF;
+                break;
+            case 5: //10Base-T full-duplex
+                speed = ETH_SPEED_10M;
+                duplex = ETH_DUPLEX_FULL;
+                break;
+            case 6: //100Base-TX full-duplex
+                speed = ETH_SPEED_100M;
+                duplex = ETH_DUPLEX_FULL;
+                break;
+            default:
+                break;
+            }
+            PHY_CHECK(eth->on_state_changed(eth, ETH_STATE_SPEED, (void *)speed) == ESP_OK,
+                      "change speed failed", err);
+            PHY_CHECK(eth->on_state_changed(eth, ETH_STATE_DUPLEX, (void *)duplex) == ESP_OK,
+                      "change duplex failed", err);
+            /* if we're in duplex mode, and peer has the flow control ability */
+            if (duplex == ETH_DUPLEX_FULL && anlpar.symmetric_pause) {
+                peer_pause_ability = 1;
+            } else {
+                peer_pause_ability = 0;
+            }
+            PHY_CHECK(eth->on_state_changed(eth, ETH_STATE_PAUSE, (void *)peer_pause_ability) == ESP_OK,
+                      "change pause ability failed", err);
+        }
+        PHY_CHECK(eth->on_state_changed(eth, ETH_STATE_LINK, (void *)link) == ESP_OK,
+                  "change link failed", err);
+        ksz80xx->link_status = link;
+    }
+    return ESP_OK;
+err:
+    return ESP_FAIL;
+}
+
+static esp_err_t ksz80xx_set_mediator(esp_eth_phy_t *phy, esp_eth_mediator_t *eth)
+{
+    PHY_CHECK(eth, "can't set mediator to null", err);
+    phy_ksz80xx_t *ksz80xx = __containerof(phy, phy_ksz80xx_t, parent);
+    ksz80xx->eth = eth;
+    return ESP_OK;
+err:
+    return ESP_ERR_INVALID_ARG;
+}
+
+static esp_err_t ksz80xx_get_link(esp_eth_phy_t *phy)
+{
+    phy_ksz80xx_t *ksz80xx = __containerof(phy, phy_ksz80xx_t, parent);
+    /* Update information about link, speed, duplex */
+    PHY_CHECK(ksz80xx_update_link_duplex_speed(ksz80xx) == ESP_OK, "update link duplex speed failed", err);
+    return ESP_OK;
+err:
+    return ESP_FAIL;
+}
+
+static esp_err_t ksz80xx_reset(esp_eth_phy_t *phy)
+{
+    phy_ksz80xx_t *ksz80xx = __containerof(phy, phy_ksz80xx_t, parent);
+    ksz80xx->link_status = ETH_LINK_DOWN;
+    esp_eth_mediator_t *eth = ksz80xx->eth;
+    bmcr_reg_t bmcr = {.reset = 1};
+    PHY_CHECK(eth->phy_reg_write(eth, ksz80xx->addr, ETH_PHY_BMCR_REG_ADDR, bmcr.val) == ESP_OK,
+              "write BMCR failed", err);
+    /* wait for reset complete */
+    uint32_t to = 0;
+    for (to = 0; to < ksz80xx->reset_timeout_ms / 10; to++) {
+        vTaskDelay(pdMS_TO_TICKS(10));
+        PHY_CHECK(eth->phy_reg_read(eth, ksz80xx->addr, ETH_PHY_BMCR_REG_ADDR, &(bmcr.val)) == ESP_OK,
+                  "read BMCR failed", err);
+        if (!bmcr.reset) {
+            break;
+        }
+    }
+    PHY_CHECK(to < ksz80xx->reset_timeout_ms / 10, "reset timeout", err);
+    return ESP_OK;
+err:
+    return ESP_FAIL;
+}
+
+static esp_err_t ksz80xx_reset_hw(esp_eth_phy_t *phy)
+{
+    phy_ksz80xx_t *ksz80xx = __containerof(phy, phy_ksz80xx_t, parent);
+    if (ksz80xx->reset_gpio_num >= 0) {
+        esp_rom_gpio_pad_select_gpio(ksz80xx->reset_gpio_num);
+        gpio_set_direction(ksz80xx->reset_gpio_num, GPIO_MODE_OUTPUT);
+        gpio_set_level(ksz80xx->reset_gpio_num, 0);
+        esp_rom_delay_us(100); // insert min input assert time
+        gpio_set_level(ksz80xx->reset_gpio_num, 1);
+    }
+    return ESP_OK;
+}
+
+static esp_err_t ksz80xx_negotiate(esp_eth_phy_t *phy)
+{
+    phy_ksz80xx_t *ksz80xx = __containerof(phy, phy_ksz80xx_t, parent);
+    esp_eth_mediator_t *eth = ksz80xx->eth;
+    /* Restart auto negotiation */
+    bmcr_reg_t bmcr = {
+        .speed_select = 1,     /* 100Mbps */
+        .duplex_mode = 1,      /* Full Duplex */
+        .en_auto_nego = 1,     /* Auto Negotiation */
+        .restart_auto_nego = 1 /* Restart Auto Negotiation */
+    };
+    PHY_CHECK(eth->phy_reg_write(eth, ksz80xx->addr, ETH_PHY_BMCR_REG_ADDR, bmcr.val) == ESP_OK, "write BMCR failed", err);
+    /* Wait for auto negotiation complete */
+    bmsr_reg_t bmsr;
+    uint32_t to = 0;
+    for (to = 0; to < ksz80xx->autonego_timeout_ms / 10; to++) {
+        vTaskDelay(pdMS_TO_TICKS(10));
+        PHY_CHECK(eth->phy_reg_read(eth, ksz80xx->addr, ETH_PHY_BMSR_REG_ADDR, &(bmsr.val)) == ESP_OK,
+                  "read BMSR failed", err);
+        if (bmsr.auto_nego_complete) {
+            break;
+        }
+    }
+    /* Auto negotiation failed, maybe no network cable plugged in, so output a warning */
+    if (to >= ksz80xx->autonego_timeout_ms / 10) {
+        ESP_LOGW(TAG, "auto negotiation timeout");
+    }
+    /* Updata information about link, speed, duplex */
+    PHY_CHECK(ksz80xx_update_link_duplex_speed(ksz80xx) == ESP_OK, "update link duplex speed failed", err);
+    return ESP_OK;
+err:
+    return ESP_FAIL;
+}
+
+static esp_err_t ksz80xx_pwrctl(esp_eth_phy_t *phy, bool enable)
+{
+    phy_ksz80xx_t *ksz80xx = __containerof(phy, phy_ksz80xx_t, parent);
+    esp_eth_mediator_t *eth = ksz80xx->eth;
+    bmcr_reg_t bmcr;
+    PHY_CHECK(eth->phy_reg_read(eth, ksz80xx->addr, ETH_PHY_BMCR_REG_ADDR, &(bmcr.val)) == ESP_OK,
+              "read BMCR failed", err);
+    if (!enable) {
+        /* General Power Down Mode */
+        bmcr.power_down = 1;
+    } else {
+        /* Normal operation Mode */
+        bmcr.power_down = 0;
+    }
+    PHY_CHECK(eth->phy_reg_write(eth, ksz80xx->addr, ETH_PHY_BMCR_REG_ADDR, bmcr.val) == ESP_OK,
+              "write BMCR failed", err);
+    if (!enable) {
+        PHY_CHECK(eth->phy_reg_read(eth, ksz80xx->addr, ETH_PHY_BMCR_REG_ADDR, &(bmcr.val)) == ESP_OK,
+                  "read BMCR failed", err);
+        PHY_CHECK(bmcr.power_down == 1, "power down failed", err);
+    } else {
+        /* wait for power up complete */
+        uint32_t to = 0;
+        for (to = 0; to < ksz80xx->reset_timeout_ms / 10; to++) {
+            vTaskDelay(pdMS_TO_TICKS(10));
+            PHY_CHECK(eth->phy_reg_read(eth, ksz80xx->addr, ETH_PHY_BMCR_REG_ADDR, &(bmcr.val)) == ESP_OK,
+                      "read BMCR failed", err);
+            if (bmcr.power_down == 0) {
+                break;
+            }
+        }
+        PHY_CHECK(to < ksz80xx->reset_timeout_ms / 10, "power up timeout", err);
+    }
+    return ESP_OK;
+err:
+    return ESP_FAIL;
+}
+
+static esp_err_t ksz80xx_set_addr(esp_eth_phy_t *phy, uint32_t addr)
+{
+    phy_ksz80xx_t *ksz80xx = __containerof(phy, phy_ksz80xx_t, parent);
+    ksz80xx->addr = addr;
+    return ESP_OK;
+}
+
+static esp_err_t ksz80xx_get_addr(esp_eth_phy_t *phy, uint32_t *addr)
+{
+    PHY_CHECK(addr, "addr can't be null", err);
+    phy_ksz80xx_t *ksz80xx = __containerof(phy, phy_ksz80xx_t, parent);
+    *addr = ksz80xx->addr;
+    return ESP_OK;
+err:
+    return ESP_ERR_INVALID_ARG;
+}
+
+static esp_err_t ksz80xx_del(esp_eth_phy_t *phy)
+{
+    phy_ksz80xx_t *ksz80xx = __containerof(phy, phy_ksz80xx_t, parent);
+    free(ksz80xx);
+    return ESP_OK;
+}
+
+static esp_err_t ksz80xx_advertise_pause_ability(esp_eth_phy_t *phy, uint32_t ability)
+{
+    phy_ksz80xx_t *ksz80xx = __containerof(phy, phy_ksz80xx_t, parent);
+    esp_eth_mediator_t *eth = ksz80xx->eth;
+    /* Set PAUSE function ability */
+    anar_reg_t anar;
+    PHY_CHECK(eth->phy_reg_read(eth, ksz80xx->addr, ETH_PHY_ANAR_REG_ADDR, &(anar.val)) == ESP_OK,
+              "read ANAR failed", err);
+    if (ability) {
+        anar.asymmetric_pause = 1;
+        anar.symmetric_pause = 1;
+    } else {
+        anar.asymmetric_pause = 0;
+        anar.symmetric_pause = 0;
+    }
+    PHY_CHECK(eth->phy_reg_write(eth, ksz80xx->addr, ETH_PHY_ANAR_REG_ADDR, anar.val) == ESP_OK,
+              "write ANAR failed", err);
+    return ESP_OK;
+err:
+    return ESP_FAIL;
+}
+
+static esp_err_t ksz80xx_init(esp_eth_phy_t *phy)
+{
+    phy_ksz80xx_t *ksz80xx = __containerof(phy, phy_ksz80xx_t, parent);
+    esp_eth_mediator_t *eth = ksz80xx->eth;
+    /* Power on Ethernet PHY */
+    PHY_CHECK(ksz80xx_pwrctl(phy, true) == ESP_OK, "power control failed", err);
+    /* Reset Ethernet PHY */
+    PHY_CHECK(ksz80xx_reset(phy) == ESP_OK, "reset failed", err);
+    /* Check PHY ID */
+    phyidr1_reg_t id1;
+    phyidr2_reg_t id2;
+    PHY_CHECK(eth->phy_reg_read(eth, ksz80xx->addr, ETH_PHY_IDR1_REG_ADDR, &(id1.val)) == ESP_OK,
+              "read ID1 failed", err);
+    PHY_CHECK(eth->phy_reg_read(eth, ksz80xx->addr, ETH_PHY_IDR2_REG_ADDR, &(id2.val)) == ESP_OK,
+              "read ID2 failed", err);
+    PHY_CHECK(id1.oui_msb == 0x22 && id2.oui_lsb == 0x5 && id2.vendor_model == ksz80xx->vendor_model, "wrong chip ID", err);
+    return ESP_OK;
+err:
+    return ESP_FAIL;
+}
+
+static esp_err_t ksz80xx_deinit(esp_eth_phy_t *phy)
+{
+    /* Power off Ethernet PHY */
+    PHY_CHECK(ksz80xx_pwrctl(phy, false) == ESP_OK, "power control failed", err);
+    return ESP_OK;
+err:
+    return ESP_FAIL;
+}
+
+esp_eth_phy_t *esp_eth_phy_new_ksz8041(const eth_phy_config_t *config)
+{
+    PHY_CHECK(config, "can't set phy config to null", err);
+    phy_ksz80xx_t *ksz8041 = calloc(1, sizeof(phy_ksz80xx_t));
+    PHY_CHECK(ksz8041, "calloc ksz80xx failed", err);
+    ksz8041->vendor_model = KSZ8041_MODEL_ID;
+    ksz8041->addr = config->phy_addr;
+    ksz8041->reset_gpio_num = config->reset_gpio_num;
+    ksz8041->reset_timeout_ms = config->reset_timeout_ms;
+    ksz8041->link_status = ETH_LINK_DOWN;
+    ksz8041->autonego_timeout_ms = config->autonego_timeout_ms;
+    ksz8041->parent.reset = ksz80xx_reset;
+    ksz8041->parent.reset_hw = ksz80xx_reset_hw;
+    ksz8041->parent.init = ksz80xx_init;
+    ksz8041->parent.deinit = ksz80xx_deinit;
+    ksz8041->parent.set_mediator = ksz80xx_set_mediator;
+    ksz8041->parent.negotiate = ksz80xx_negotiate;
+    ksz8041->parent.get_link = ksz80xx_get_link;
+    ksz8041->parent.pwrctl = ksz80xx_pwrctl;
+    ksz8041->parent.get_addr = ksz80xx_get_addr;
+    ksz8041->parent.set_addr = ksz80xx_set_addr;
+    ksz8041->parent.advertise_pause_ability = ksz80xx_advertise_pause_ability;
+    ksz8041->parent.del = ksz80xx_del;
+
+    return &(ksz8041->parent);
+err:
+    return NULL;
+}
+
+esp_eth_phy_t *esp_eth_phy_new_ksz8081(const eth_phy_config_t *config)
+{
+    PHY_CHECK(config, "can't set phy config to null", err);
+    phy_ksz80xx_t *ksz8081 = calloc(1, sizeof(phy_ksz80xx_t));
+    PHY_CHECK(ksz8081, "calloc ksz8081 failed", err);
+    ksz8081->vendor_model = KSZ8081_MODEL_ID;
+    ksz8081->addr = config->phy_addr;
+    ksz8081->reset_gpio_num = config->reset_gpio_num;
+    ksz8081->reset_timeout_ms = config->reset_timeout_ms;
+    ksz8081->link_status = ETH_LINK_DOWN;
+    ksz8081->autonego_timeout_ms = config->autonego_timeout_ms;
+    ksz8081->parent.reset = ksz80xx_reset;
+    ksz8081->parent.reset_hw = ksz80xx_reset_hw;
+    ksz8081->parent.init = ksz80xx_init;
+    ksz8081->parent.deinit = ksz80xx_deinit;
+    ksz8081->parent.set_mediator = ksz80xx_set_mediator;
+    ksz8081->parent.negotiate = ksz80xx_negotiate;
+    ksz8081->parent.get_link = ksz80xx_get_link;
+    ksz8081->parent.pwrctl = ksz80xx_pwrctl;
+    ksz8081->parent.get_addr = ksz80xx_get_addr;
+    ksz8081->parent.set_addr = ksz80xx_set_addr;
+    ksz8081->parent.advertise_pause_ability = ksz80xx_advertise_pause_ability;
+    ksz8081->parent.del = ksz80xx_del;
+
+    return &(ksz8081->parent);
+err:
+    return NULL;
+}

examples/ethernet/basic/main/Kconfig.projbuild

@@ -70,6 +70,12 @@ menu "Example Configuration"
                 help
                     The KSZ8041 is a single supply 10Base-T/100Base-TX Physical Layer Transceiver.
                     Goto https://www.microchip.com/wwwproducts/en/KSZ8041 for more information about it.
+
+            config EXAMPLE_ETH_PHY_KSZ8081
+                bool "KSZ8081"
+                help
+                    The KSZ8081 is a single supply 10Base-T/100Base-TX Physical Layer Transceiver.
+                    Goto https://www.microchip.com/wwwproducts/en/KSZ8081 for more information about it.
         endchoice # EXAMPLE_ETH_PHY_MODEL
 
         config EXAMPLE_ETH_MDC_GPIO

examples/ethernet/basic/main/ethernet_example_main.c

@@ -98,6 +98,8 @@ void app_main(void)
     esp_eth_phy_t *phy = esp_eth_phy_new_dp83848(&phy_config);
 #elif CONFIG_EXAMPLE_ETH_PHY_KSZ8041
     esp_eth_phy_t *phy = esp_eth_phy_new_ksz8041(&phy_config);
+#elif CONFIG_EXAMPLE_ETH_PHY_KSZ8081
+    esp_eth_phy_t *phy = esp_eth_phy_new_ksz8081(&phy_config);
 #endif
 #elif CONFIG_ETH_USE_SPI_ETHERNET
     gpio_install_isr_service(0);