328 lines
11 KiB
C
328 lines
11 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_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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static const char *TAG = "rtl8201";
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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 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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uint32_t 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_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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PHY_CHECK(eth->phy_reg_write(eth, rtl8201->addr, ETH_PHY_PSR_REG_ADDR, psr.val) == ESP_OK, "write PSR 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 rtl8201_update_link_duplex_speed(phy_rtl8201_t *rtl8201)
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{
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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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PHY_CHECK(rtl8201_page_select(rtl8201, 0) == ESP_OK, "select page 0 failed", err);
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PHY_CHECK(eth->phy_reg_read(eth, rtl8201->addr, ETH_PHY_BMSR_REG_ADDR, &(bmsr.val)) == ESP_OK,
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"read BMSR failed", err);
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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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PHY_CHECK(eth->phy_reg_read(eth, rtl8201->addr, ETH_PHY_BMCR_REG_ADDR, &(bmcr.val)) == ESP_OK,
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"read BMCR failed", err);
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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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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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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 ESP_FAIL;
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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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PHY_CHECK(eth, "can't set mediator to null", err);
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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 ESP_ERR_INVALID_ARG;
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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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phy_rtl8201_t *rtl8201 = __containerof(phy, phy_rtl8201_t, parent);
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/* Updata information about link, speed, duplex */
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PHY_CHECK(rtl8201_update_link_duplex_speed(rtl8201) == 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 rtl8201_reset(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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esp_eth_mediator_t *eth = rtl8201->eth;
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bmcr_reg_t bmcr = {.reset = 1};
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PHY_CHECK(eth->phy_reg_write(eth, rtl8201->addr, ETH_PHY_BMCR_REG_ADDR, bmcr.val) == ESP_OK,
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"write BMCR failed", err);
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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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PHY_CHECK(eth->phy_reg_read(eth, rtl8201->addr, ETH_PHY_BMCR_REG_ADDR, &(bmcr.val)) == ESP_OK,
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"read BMCR failed", err);
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if (!bmcr.reset) {
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break;
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}
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}
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PHY_CHECK(to < rtl8201->reset_timeout_ms / 10, "reset timeout", 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 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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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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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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static esp_err_t rtl8201_negotiate(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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esp_eth_mediator_t *eth = rtl8201->eth;
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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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PHY_CHECK(eth->phy_reg_write(eth, rtl8201->addr, ETH_PHY_BMCR_REG_ADDR, bmcr.val) == ESP_OK,
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"write BMCR failed", err);
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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 / 10; to++) {
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vTaskDelay(pdMS_TO_TICKS(10));
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PHY_CHECK(eth->phy_reg_read(eth, rtl8201->addr, ETH_PHY_BMSR_REG_ADDR, &(bmsr.val)) == ESP_OK,
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"read BMSR failed", err);
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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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/* Auto negotiation failed, maybe no network cable plugged in, so output a warning */
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if (to >= rtl8201->autonego_timeout_ms / 10) {
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ESP_LOGW(TAG, "auto negotiation timeout");
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}
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/* Updata information about link, speed, duplex */
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PHY_CHECK(rtl8201_update_link_duplex_speed(rtl8201) == 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 rtl8201_pwrctl(esp_eth_phy_t *phy, bool enable)
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{
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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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PHY_CHECK(eth->phy_reg_read(eth, rtl8201->addr, ETH_PHY_BMCR_REG_ADDR, &(bmcr.val)) == ESP_OK,
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"read BMCR failed", err);
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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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PHY_CHECK(eth->phy_reg_write(eth, rtl8201->addr, ETH_PHY_BMCR_REG_ADDR, bmcr.val) == ESP_OK,
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"write BMCR failed", err);
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PHY_CHECK(eth->phy_reg_read(eth, rtl8201->addr, ETH_PHY_BMCR_REG_ADDR, &(bmcr.val)) == ESP_OK,
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"read BMCR failed", err);
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if (!enable) {
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PHY_CHECK(bmcr.power_down == 1, "power down failed", err);
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} else {
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PHY_CHECK(bmcr.power_down == 0, "power up failed", err);
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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 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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PHY_CHECK(addr, "addr can't be null", err);
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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 ESP_ERR_INVALID_ARG;
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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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if (atomic_fetch_sub(&phy->ref_count, 1) == 1) {
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free(rtl8201);
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}
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return ESP_OK;
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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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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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/* Power on Ethernet PHY */
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PHY_CHECK(rtl8201_pwrctl(phy, true) == ESP_OK, "power control failed", err);
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/* Reset Ethernet PHY */
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PHY_CHECK(rtl8201_reset(phy) == ESP_OK, "reset failed", err);
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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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PHY_CHECK(eth->phy_reg_read(eth, rtl8201->addr, ETH_PHY_IDR1_REG_ADDR, &(id1.val)) == ESP_OK,
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"read ID1 failed", err);
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PHY_CHECK(eth->phy_reg_read(eth, rtl8201->addr, ETH_PHY_IDR2_REG_ADDR, &(id2.val)) == ESP_OK,
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"read ID2 failed", err);
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PHY_CHECK(id1.oui_msb == 0x1C && id2.oui_lsb == 0x32 && id2.vendor_model == 0x1,
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"wrong chip ID", 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 rtl8201_deinit(esp_eth_phy_t *phy)
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{
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/* Power off Ethernet PHY */
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PHY_CHECK(rtl8201_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_rtl8201(const eth_phy_config_t *config)
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{
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PHY_CHECK(config, "can't set phy config to null", err);
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phy_rtl8201_t *rtl8201 = calloc(1, sizeof(phy_rtl8201_t));
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PHY_CHECK(rtl8201, "calloc rtl8201 failed", err);
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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.del = rtl8201_del;
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atomic_init(&rtl8201->parent.ref_count, 1);
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return &(rtl8201->parent);
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err:
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return NULL;
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}
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