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387 lines
14 KiB
C
387 lines
14 KiB
C
// Copyright 2019 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_check.h"
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#include "esp_eth.h"
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#include "eth_phy_regs_struct.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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static const char *TAG = "rtl8201";
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/***************Vendor Specific Register***************/
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/**
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* @brief PSMR(Power Saving Mode Register)
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*
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*/
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typedef union {
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struct {
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uint16_t reserved : 15; /* Reserved */
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uint16_t en_pwr_save : 1; /* Enable power saving mode */
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};
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uint16_t val;
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} psmr_reg_t;
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#define ETH_PHY_PSMR_REG_ADDR (0x18)
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/**
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* @brief PSR(Page Select Register)
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*
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*/
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typedef union {
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struct {
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uint16_t page_select : 8; /* Select register page, default is 0 */
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uint16_t reserved : 8; /* Reserved */
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};
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uint16_t val;
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} psr_reg_t;
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#define ETH_PHY_PSR_REG_ADDR (0x1F)
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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_rtl8201_t;
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static esp_err_t rtl8201_page_select(phy_rtl8201_t *rtl8201, uint32_t page)
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{
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esp_err_t ret = ESP_OK;
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esp_eth_mediator_t *eth = rtl8201->eth;
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psr_reg_t psr = {
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.page_select = page
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};
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ESP_GOTO_ON_ERROR(eth->phy_reg_write(eth, rtl8201->addr, ETH_PHY_PSR_REG_ADDR, psr.val), err, TAG, "write PSR failed");
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return ESP_OK;
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err:
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return ret;
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}
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static esp_err_t rtl8201_update_link_duplex_speed(phy_rtl8201_t *rtl8201)
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{
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esp_err_t ret = ESP_OK;
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esp_eth_mediator_t *eth = rtl8201->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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bmcr_reg_t bmcr;
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bmsr_reg_t bmsr;
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uint32_t peer_pause_ability = false;
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anlpar_reg_t anlpar;
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ESP_GOTO_ON_ERROR(rtl8201_page_select(rtl8201, 0), err, TAG, "select page 0 failed");
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ESP_GOTO_ON_ERROR(eth->phy_reg_read(eth, rtl8201->addr, ETH_PHY_BMSR_REG_ADDR, &(bmsr.val)), err, TAG, "read BMSR failed");
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ESP_GOTO_ON_ERROR(eth->phy_reg_read(eth, rtl8201->addr, ETH_PHY_ANLPAR_REG_ADDR, &(anlpar.val)), err, TAG, "read ANLPAR failed");
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eth_link_t link = bmsr.link_status ? ETH_LINK_UP : ETH_LINK_DOWN;
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/* check if link status changed */
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if (rtl8201->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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ESP_GOTO_ON_ERROR(eth->phy_reg_read(eth, rtl8201->addr, ETH_PHY_BMCR_REG_ADDR, &(bmcr.val)), err, TAG, "read BMCR failed");
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if (bmcr.speed_select) {
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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 (bmcr.duplex_mode) {
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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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ESP_GOTO_ON_ERROR(eth->on_state_changed(eth, ETH_STATE_SPEED, (void *)speed), err, TAG, "change speed failed");
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ESP_GOTO_ON_ERROR(eth->on_state_changed(eth, ETH_STATE_DUPLEX, (void *)duplex), err, TAG, "change duplex failed");
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/* if we're in duplex mode, and peer has the flow control ability */
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if (duplex == ETH_DUPLEX_FULL && anlpar.symmetric_pause) {
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peer_pause_ability = 1;
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} else {
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peer_pause_ability = 0;
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}
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ESP_GOTO_ON_ERROR(eth->on_state_changed(eth, ETH_STATE_PAUSE, (void *)peer_pause_ability), err, TAG, "change pause ability failed");
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}
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ESP_GOTO_ON_ERROR(eth->on_state_changed(eth, ETH_STATE_LINK, (void *)link), err, TAG, "change link failed");
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rtl8201->link_status = link;
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}
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return ESP_OK;
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err:
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return ret;
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}
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static esp_err_t rtl8201_set_mediator(esp_eth_phy_t *phy, esp_eth_mediator_t *eth)
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{
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esp_err_t ret = ESP_OK;
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ESP_GOTO_ON_FALSE(eth, ESP_ERR_INVALID_ARG, err, TAG, "can't set mediator to null");
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phy_rtl8201_t *rtl8201 = __containerof(phy, phy_rtl8201_t, parent);
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rtl8201->eth = eth;
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return ESP_OK;
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err:
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return ret;
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}
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static esp_err_t rtl8201_get_link(esp_eth_phy_t *phy)
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{
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esp_err_t ret = ESP_OK;
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phy_rtl8201_t *rtl8201 = __containerof(phy, phy_rtl8201_t, parent);
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/* Updata information about link, speed, duplex */
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ESP_GOTO_ON_ERROR(rtl8201_update_link_duplex_speed(rtl8201), err, TAG, "update link duplex speed failed");
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return ESP_OK;
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err:
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return ret;
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}
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static esp_err_t rtl8201_reset(esp_eth_phy_t *phy)
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{
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esp_err_t ret = ESP_OK;
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phy_rtl8201_t *rtl8201 = __containerof(phy, phy_rtl8201_t, parent);
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rtl8201->link_status = ETH_LINK_DOWN;
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esp_eth_mediator_t *eth = rtl8201->eth;
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bmcr_reg_t bmcr = {.reset = 1};
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ESP_GOTO_ON_ERROR(eth->phy_reg_write(eth, rtl8201->addr, ETH_PHY_BMCR_REG_ADDR, bmcr.val), err, TAG, "write BMCR failed");
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/* Wait for reset complete */
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uint32_t to = 0;
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for (to = 0; to < rtl8201->reset_timeout_ms / 10; to++) {
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vTaskDelay(pdMS_TO_TICKS(10));
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ESP_GOTO_ON_ERROR(eth->phy_reg_read(eth, rtl8201->addr, ETH_PHY_BMCR_REG_ADDR, &(bmcr.val)), err, TAG, "read BMCR failed");
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if (!bmcr.reset) {
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break;
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}
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}
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ESP_GOTO_ON_FALSE(to < rtl8201->reset_timeout_ms / 10, ESP_FAIL, err, TAG, "reset timeout");
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return ESP_OK;
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err:
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return ret;
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}
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static esp_err_t rtl8201_reset_hw(esp_eth_phy_t *phy)
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{
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phy_rtl8201_t *rtl8201 = __containerof(phy, phy_rtl8201_t, parent);
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if (rtl8201->reset_gpio_num >= 0) {
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esp_rom_gpio_pad_select_gpio(rtl8201->reset_gpio_num);
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gpio_set_direction(rtl8201->reset_gpio_num, GPIO_MODE_OUTPUT);
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gpio_set_level(rtl8201->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(rtl8201->reset_gpio_num, 1);
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}
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return ESP_OK;
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}
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/**
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* @note This function is responsible for restarting a new auto-negotiation,
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* the result of negotiation won't be relected to uppler layers.
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* Instead, the negotiation result is fetched by linker timer, see `rtl8201_get_link()`
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*/
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static esp_err_t rtl8201_negotiate(esp_eth_phy_t *phy)
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{
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esp_err_t ret = ESP_OK;
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phy_rtl8201_t *rtl8201 = __containerof(phy, phy_rtl8201_t, parent);
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esp_eth_mediator_t *eth = rtl8201->eth;
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/* in case any link status has changed, let's assume we're in link down status */
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rtl8201->link_status = ETH_LINK_DOWN;
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/* Restart auto negotiation */
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bmcr_reg_t bmcr = {
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.speed_select = 1, /* 100Mbps */
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.duplex_mode = 1, /* Full Duplex */
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.en_auto_nego = 1, /* Auto Negotiation */
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.restart_auto_nego = 1 /* Restart Auto Negotiation */
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};
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ESP_GOTO_ON_ERROR(eth->phy_reg_write(eth, rtl8201->addr, ETH_PHY_BMCR_REG_ADDR, bmcr.val), err, TAG, "write BMCR failed");
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/* Wait for auto negotiation complete */
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bmsr_reg_t bmsr;
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uint32_t to = 0;
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for (to = 0; to < rtl8201->autonego_timeout_ms / 100; to++) {
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vTaskDelay(pdMS_TO_TICKS(100));
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ESP_GOTO_ON_ERROR(eth->phy_reg_read(eth, rtl8201->addr, ETH_PHY_BMSR_REG_ADDR, &(bmsr.val)), err, TAG, "read BMSR failed");
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if (bmsr.auto_nego_complete) {
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break;
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}
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}
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if ((to >= rtl8201->autonego_timeout_ms / 100) && (rtl8201->link_status == ETH_LINK_UP)) {
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ESP_LOGW(TAG, "auto negotiation timeout");
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}
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return ESP_OK;
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err:
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return ret;
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}
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static esp_err_t rtl8201_pwrctl(esp_eth_phy_t *phy, bool enable)
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{
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esp_err_t ret = ESP_OK;
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phy_rtl8201_t *rtl8201 = __containerof(phy, phy_rtl8201_t, parent);
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esp_eth_mediator_t *eth = rtl8201->eth;
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bmcr_reg_t bmcr;
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ESP_GOTO_ON_ERROR(eth->phy_reg_read(eth, rtl8201->addr, ETH_PHY_BMCR_REG_ADDR, &(bmcr.val)), err, TAG, "read BMCR failed");
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if (!enable) {
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/* Enable IEEE Power Down Mode */
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bmcr.power_down = 1;
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} else {
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/* Disable IEEE Power Down Mode */
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bmcr.power_down = 0;
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}
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ESP_GOTO_ON_ERROR(eth->phy_reg_write(eth, rtl8201->addr, ETH_PHY_BMCR_REG_ADDR, bmcr.val), err, TAG, "write BMCR failed");
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if (!enable) {
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ESP_GOTO_ON_ERROR(eth->phy_reg_read(eth, rtl8201->addr, ETH_PHY_BMCR_REG_ADDR, &(bmcr.val)), err, TAG, "read BMCR failed");
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ESP_GOTO_ON_FALSE(bmcr.power_down == 1, ESP_FAIL, err, TAG, "power down failed");
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} else {
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/* wait for power up complete */
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uint32_t to = 0;
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for (to = 0; to < rtl8201->reset_timeout_ms / 10; to++) {
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vTaskDelay(pdMS_TO_TICKS(10));
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ESP_GOTO_ON_ERROR(eth->phy_reg_read(eth, rtl8201->addr, ETH_PHY_BMCR_REG_ADDR, &(bmcr.val)), err, TAG, "read BMCR failed");
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if (bmcr.power_down == 0) {
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break;
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}
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}
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ESP_GOTO_ON_FALSE(to < rtl8201->reset_timeout_ms / 10, ESP_FAIL, err, TAG, "power up timeout");
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}
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return ESP_OK;
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err:
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return ret;
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}
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static esp_err_t rtl8201_set_addr(esp_eth_phy_t *phy, uint32_t addr)
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{
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phy_rtl8201_t *rtl8201 = __containerof(phy, phy_rtl8201_t, parent);
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rtl8201->addr = addr;
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return ESP_OK;
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}
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static esp_err_t rtl8201_get_addr(esp_eth_phy_t *phy, uint32_t *addr)
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{
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esp_err_t ret = ESP_OK;
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ESP_GOTO_ON_FALSE(addr, ESP_ERR_INVALID_ARG, err, TAG, "addr can't be null");
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phy_rtl8201_t *rtl8201 = __containerof(phy, phy_rtl8201_t, parent);
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*addr = rtl8201->addr;
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return ESP_OK;
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err:
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return ret;
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}
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static esp_err_t rtl8201_del(esp_eth_phy_t *phy)
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{
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phy_rtl8201_t *rtl8201 = __containerof(phy, phy_rtl8201_t, parent);
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free(rtl8201);
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return ESP_OK;
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}
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static esp_err_t rtl8201_advertise_pause_ability(esp_eth_phy_t *phy, uint32_t ability)
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{
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esp_err_t ret = ESP_OK;
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phy_rtl8201_t *rtl8201 = __containerof(phy, phy_rtl8201_t, parent);
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esp_eth_mediator_t *eth = rtl8201->eth;
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/* Set PAUSE function ability */
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anar_reg_t anar;
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ESP_GOTO_ON_ERROR(eth->phy_reg_read(eth, rtl8201->addr, ETH_PHY_ANAR_REG_ADDR, &(anar.val)), err, TAG, "read ANAR failed");
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if (ability) {
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anar.asymmetric_pause = 1;
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anar.symmetric_pause = 1;
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} else {
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anar.asymmetric_pause = 0;
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anar.symmetric_pause = 0;
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}
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ESP_GOTO_ON_ERROR(eth->phy_reg_write(eth, rtl8201->addr, ETH_PHY_ANAR_REG_ADDR, anar.val), err, TAG, "write ANAR failed");
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return ESP_OK;
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err:
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return ret;
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}
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static esp_err_t rtl8201_loopback(esp_eth_phy_t *phy, bool enable)
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{
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esp_err_t ret = ESP_OK;
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phy_rtl8201_t *rtl8201 = __containerof(phy, phy_rtl8201_t, parent);
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esp_eth_mediator_t *eth = rtl8201->eth;
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/* Set Loopback function */
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bmcr_reg_t bmcr;
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ESP_GOTO_ON_ERROR(eth->phy_reg_read(eth, rtl8201->addr, ETH_PHY_BMCR_REG_ADDR, &(bmcr.val)), err, TAG, "read BMCR failed");
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if (enable) {
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bmcr.en_loopback = 1;
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} else {
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bmcr.en_loopback = 0;
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}
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ESP_GOTO_ON_ERROR(eth->phy_reg_write(eth, rtl8201->addr, ETH_PHY_BMCR_REG_ADDR, bmcr.val), err, TAG, "write BMCR failed");
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return ESP_OK;
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err:
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return ret;
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}
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static esp_err_t rtl8201_init(esp_eth_phy_t *phy)
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{
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esp_err_t ret = ESP_OK;
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phy_rtl8201_t *rtl8201 = __containerof(phy, phy_rtl8201_t, parent);
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esp_eth_mediator_t *eth = rtl8201->eth;
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// Detect PHY address
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if (rtl8201->addr == ESP_ETH_PHY_ADDR_AUTO) {
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ESP_GOTO_ON_ERROR(esp_eth_detect_phy_addr(eth, &rtl8201->addr), err, TAG, "Detect PHY address failed");
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}
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/* Power on Ethernet PHY */
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ESP_GOTO_ON_ERROR(rtl8201_pwrctl(phy, true), err, TAG, "power control failed");
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/* Reset Ethernet PHY */
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ESP_GOTO_ON_ERROR(rtl8201_reset(phy), err, TAG, "reset failed");
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/* Check PHY ID */
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phyidr1_reg_t id1;
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phyidr2_reg_t id2;
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ESP_GOTO_ON_ERROR(eth->phy_reg_read(eth, rtl8201->addr, ETH_PHY_IDR1_REG_ADDR, &(id1.val)), err, TAG, "read ID1 failed");
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ESP_GOTO_ON_ERROR(eth->phy_reg_read(eth, rtl8201->addr, ETH_PHY_IDR2_REG_ADDR, &(id2.val)), err, TAG, "read ID2 failed");
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ESP_GOTO_ON_FALSE(id1.oui_msb == 0x1C && id2.oui_lsb == 0x32 && id2.vendor_model == 0x1, ESP_FAIL, err, TAG, "wrong chip ID");
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return ESP_OK;
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err:
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return ret;
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}
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static esp_err_t rtl8201_deinit(esp_eth_phy_t *phy)
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{
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esp_err_t ret = ESP_OK;
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/* Power off Ethernet PHY */
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ESP_GOTO_ON_ERROR(rtl8201_pwrctl(phy, false), err, TAG, "power control failed");
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return ESP_OK;
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err:
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return ret;
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}
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esp_eth_phy_t *esp_eth_phy_new_rtl8201(const eth_phy_config_t *config)
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{
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esp_eth_phy_t *ret = NULL;
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ESP_GOTO_ON_FALSE(config, NULL, err, TAG, "can't set phy config to null");
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phy_rtl8201_t *rtl8201 = calloc(1, sizeof(phy_rtl8201_t));
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ESP_GOTO_ON_FALSE(rtl8201, NULL, err, TAG, "calloc rtl8201 failed");
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rtl8201->addr = config->phy_addr;
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rtl8201->reset_gpio_num = config->reset_gpio_num;
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rtl8201->reset_timeout_ms = config->reset_timeout_ms;
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rtl8201->link_status = ETH_LINK_DOWN;
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rtl8201->autonego_timeout_ms = config->autonego_timeout_ms;
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rtl8201->parent.reset = rtl8201_reset;
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rtl8201->parent.reset_hw = rtl8201_reset_hw;
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rtl8201->parent.init = rtl8201_init;
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rtl8201->parent.deinit = rtl8201_deinit;
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rtl8201->parent.set_mediator = rtl8201_set_mediator;
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rtl8201->parent.negotiate = rtl8201_negotiate;
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rtl8201->parent.get_link = rtl8201_get_link;
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rtl8201->parent.pwrctl = rtl8201_pwrctl;
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rtl8201->parent.get_addr = rtl8201_get_addr;
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rtl8201->parent.set_addr = rtl8201_set_addr;
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rtl8201->parent.advertise_pause_ability = rtl8201_advertise_pause_ability;
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rtl8201->parent.loopback = rtl8201_loopback;
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rtl8201->parent.del = rtl8201_del;
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return &(rtl8201->parent);
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err:
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return ret;
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}
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