mirror of
https://github.com/espressif/esp-idf.git
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253 lines
8.8 KiB
C
253 lines
8.8 KiB
C
// Copyright 2020 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <string.h>
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#include <stdlib.h>
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#include <sys/cdefs.h>
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#include "esp_log.h"
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#include "esp_eth.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "driver/gpio.h"
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#include "esp_rom_gpio.h"
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#include "esp_rom_sys.h"
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#include "w5500.h"
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static const char *TAG = "w5500-phy";
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#define PHY_CHECK(a, str, goto_tag, ...) \
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do \
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{ \
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if (!(a)) \
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{ \
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ESP_LOGE(TAG, "%s(%d): " str, __FUNCTION__, __LINE__, ##__VA_ARGS__); \
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goto goto_tag; \
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} \
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} while (0)
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/***************Vendor Specific Register***************/
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/**
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* @brief PHYCFGR(PHY Configuration Register)
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*
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*/
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typedef union {
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struct {
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uint8_t link: 1; /*!< Link status */
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uint8_t speed: 1; /*!< Speed status */
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uint8_t duplex: 1; /*!< Duplex status */
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uint8_t opmode: 3; /*!< Operation mode */
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uint8_t opsel: 1; /*!< Operation select */
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uint8_t reset: 1; /*!< Reset, when this bit is '0', PHY will get reset */
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};
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uint8_t val;
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} phycfg_reg_t;
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typedef struct {
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esp_eth_phy_t parent;
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esp_eth_mediator_t *eth;
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int addr;
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uint32_t reset_timeout_ms;
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uint32_t autonego_timeout_ms;
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eth_link_t link_status;
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int reset_gpio_num;
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} phy_w5500_t;
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static esp_err_t w5500_update_link_duplex_speed(phy_w5500_t *w5500)
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{
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esp_eth_mediator_t *eth = w5500->eth;
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eth_speed_t speed = ETH_SPEED_10M;
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eth_duplex_t duplex = ETH_DUPLEX_HALF;
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phycfg_reg_t phycfg;
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PHY_CHECK(eth->phy_reg_read(eth, w5500->addr, W5500_REG_PHYCFGR, (uint32_t *) & (phycfg.val)) == ESP_OK, "read PHYCFG failed", err);
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eth_link_t link = phycfg.link ? ETH_LINK_UP : ETH_LINK_DOWN;
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/* check if link status changed */
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if (w5500->link_status != link) {
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/* when link up, read negotiation result */
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if (link == ETH_LINK_UP) {
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if (phycfg.speed) {
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speed = ETH_SPEED_100M;
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} else {
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speed = ETH_SPEED_10M;
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}
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if (phycfg.duplex) {
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duplex = ETH_DUPLEX_FULL;
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} else {
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duplex = ETH_DUPLEX_HALF;
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}
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PHY_CHECK(eth->on_state_changed(eth, ETH_STATE_SPEED, (void *)speed) == ESP_OK,
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"change speed failed", err);
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PHY_CHECK(eth->on_state_changed(eth, ETH_STATE_DUPLEX, (void *)duplex) == ESP_OK,
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"change duplex failed", err);
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}
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PHY_CHECK(eth->on_state_changed(eth, ETH_STATE_LINK, (void *)link) == ESP_OK,
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"change link failed", err);
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w5500->link_status = link;
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}
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return ESP_OK;
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err:
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return ESP_FAIL;
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}
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static esp_err_t w5500_set_mediator(esp_eth_phy_t *phy, esp_eth_mediator_t *eth)
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{
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PHY_CHECK(eth, "can't set mediator to null", err);
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phy_w5500_t *w5500 = __containerof(phy, phy_w5500_t, parent);
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w5500->eth = eth;
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return ESP_OK;
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err:
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return ESP_ERR_INVALID_ARG;
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}
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static esp_err_t w5500_get_link(esp_eth_phy_t *phy)
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{
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phy_w5500_t *w5500 = __containerof(phy, phy_w5500_t, parent);
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/* Updata information about link, speed, duplex */
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PHY_CHECK(w5500_update_link_duplex_speed(w5500) == ESP_OK, "update link duplex speed failed", err);
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return ESP_OK;
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err:
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return ESP_FAIL;
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}
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static esp_err_t w5500_reset(esp_eth_phy_t *phy)
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{
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phy_w5500_t *w5500 = __containerof(phy, phy_w5500_t, parent);
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w5500->link_status = ETH_LINK_DOWN;
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esp_eth_mediator_t *eth = w5500->eth;
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phycfg_reg_t phycfg;
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PHY_CHECK(eth->phy_reg_read(eth, w5500->addr, W5500_REG_PHYCFGR, (uint32_t *) & (phycfg.val)) == ESP_OK, "read PHYCFG failed", err);
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phycfg.reset = 0; // set to '0' will reset internal PHY
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PHY_CHECK(eth->phy_reg_write(eth, w5500->addr, W5500_REG_PHYCFGR, phycfg.val) == ESP_OK, "write PHYCFG failed", err);
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vTaskDelay(pdMS_TO_TICKS(10));
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phycfg.reset = 1; // set to '1' after reset
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PHY_CHECK(eth->phy_reg_write(eth, w5500->addr, W5500_REG_PHYCFGR, phycfg.val) == ESP_OK, "write PHYCFG failed", err);
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return ESP_OK;
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err:
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return ESP_FAIL;
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}
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static esp_err_t w5500_reset_hw(esp_eth_phy_t *phy)
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{
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phy_w5500_t *w5500 = __containerof(phy, phy_w5500_t, parent);
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// set reset_gpio_num to a negative value can skip hardware reset phy chip
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if (w5500->reset_gpio_num >= 0) {
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esp_rom_gpio_pad_select_gpio(w5500->reset_gpio_num);
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gpio_set_direction(w5500->reset_gpio_num, GPIO_MODE_OUTPUT);
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gpio_set_level(w5500->reset_gpio_num, 0);
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esp_rom_delay_us(100); // insert min input assert time
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gpio_set_level(w5500->reset_gpio_num, 1);
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}
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return ESP_OK;
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}
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static esp_err_t w5500_negotiate(esp_eth_phy_t *phy)
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{
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phy_w5500_t *w5500 = __containerof(phy, phy_w5500_t, parent);
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esp_eth_mediator_t *eth = w5500->eth;
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phycfg_reg_t phycfg;
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PHY_CHECK(eth->phy_reg_read(eth, w5500->addr, W5500_REG_PHYCFGR, (uint32_t *) & (phycfg.val)) == ESP_OK, "read PHYCFG failed", err);
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phycfg.opsel = 1; // PHY working mode configured by register
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phycfg.opmode = 7; // all capable, auto-negotiation enabled
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PHY_CHECK(eth->phy_reg_write(eth, w5500->addr, W5500_REG_PHYCFGR, phycfg.val) == ESP_OK, "write PHYCFG failed", err);
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/* Update information about link, speed, duplex */
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PHY_CHECK(w5500_update_link_duplex_speed(w5500) == ESP_OK, "update link duplex speed failed", err);
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return ESP_OK;
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err:
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return ESP_FAIL;
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}
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static esp_err_t w5500_pwrctl(esp_eth_phy_t *phy, bool enable)
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{
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// power control is not supported for W5500 internal PHY
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return ESP_OK;
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}
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static esp_err_t w5500_set_addr(esp_eth_phy_t *phy, uint32_t addr)
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{
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phy_w5500_t *w5500 = __containerof(phy, phy_w5500_t, parent);
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w5500->addr = addr;
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return ESP_OK;
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}
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static esp_err_t w5500_get_addr(esp_eth_phy_t *phy, uint32_t *addr)
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{
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PHY_CHECK(addr, "addr can't be null", err);
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phy_w5500_t *w5500 = __containerof(phy, phy_w5500_t, parent);
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*addr = w5500->addr;
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return ESP_OK;
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err:
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return ESP_ERR_INVALID_ARG;
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}
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static esp_err_t w5500_del(esp_eth_phy_t *phy)
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{
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phy_w5500_t *w5500 = __containerof(phy, phy_w5500_t, parent);
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free(w5500);
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return ESP_OK;
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}
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static esp_err_t w5500_advertise_pause_ability(esp_eth_phy_t *phy, uint32_t ability)
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{
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// pause ability advertisement is not supported for W5500 internal PHY
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return ESP_OK;
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}
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static esp_err_t w5500_init(esp_eth_phy_t *phy)
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{
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/* Power on Ethernet PHY */
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PHY_CHECK(w5500_pwrctl(phy, true) == ESP_OK, "power control failed", err);
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/* Reset Ethernet PHY */
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PHY_CHECK(w5500_reset(phy) == ESP_OK, "reset failed", err);
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return ESP_OK;
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err:
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return ESP_FAIL;
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}
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static esp_err_t w5500_deinit(esp_eth_phy_t *phy)
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{
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/* Power off Ethernet PHY */
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PHY_CHECK(w5500_pwrctl(phy, false) == ESP_OK, "power control failed", err);
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return ESP_OK;
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err:
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return ESP_FAIL;
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}
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esp_eth_phy_t *esp_eth_phy_new_w5500(const eth_phy_config_t *config)
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{
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PHY_CHECK(config, "invalid arguments", err);
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phy_w5500_t *w5500 = calloc(1, sizeof(phy_w5500_t));
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PHY_CHECK(w5500, "no mem for PHY instance", err);
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w5500->addr = config->phy_addr;
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w5500->reset_timeout_ms = config->reset_timeout_ms;
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w5500->reset_gpio_num = config->reset_gpio_num;
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w5500->link_status = ETH_LINK_DOWN;
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w5500->autonego_timeout_ms = config->autonego_timeout_ms;
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w5500->parent.reset = w5500_reset;
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w5500->parent.reset_hw = w5500_reset_hw;
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w5500->parent.init = w5500_init;
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w5500->parent.deinit = w5500_deinit;
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w5500->parent.set_mediator = w5500_set_mediator;
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w5500->parent.negotiate = w5500_negotiate;
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w5500->parent.get_link = w5500_get_link;
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w5500->parent.pwrctl = w5500_pwrctl;
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w5500->parent.get_addr = w5500_get_addr;
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w5500->parent.set_addr = w5500_set_addr;
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w5500->parent.advertise_pause_ability = w5500_advertise_pause_ability;
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w5500->parent.del = w5500_del;
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return &(w5500->parent);
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err:
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return NULL;
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}
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