303 lines
12 KiB
C
303 lines
12 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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static const char *TAG = "dp83848";
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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 PHYSTS(PHY Status Register)
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*
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*/
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typedef union {
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struct {
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uint32_t link_status : 1; /* Link Status */
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uint32_t speed_status : 1; /* Link Status */
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uint32_t duplex_status : 1; /* Duplex Status */
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uint32_t loopback_status : 1; /* MII Loopback */
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uint32_t auto_nego_complete : 1; /* Auto-Negotiation Complete */
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uint32_t jabber_detect : 1; /* Jabber Detect */
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uint32_t remote_fault : 1; /* Remote Fault */
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uint32_t mii_interrupt : 1; /* MII Interrupt Pending */
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uint32_t page_received : 1; /* Link Code Word Page Received */
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uint32_t descrambler_lock : 1; /* Descrambler Lock */
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uint32_t signal_detect : 1; /* Signal Detect */
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uint32_t false_carrier_sense_latch : 1; /* False Carrier Sense Latch */
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uint32_t polarity_status : 1; /* Polarity Status */
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uint32_t receive_error_latch : 1; /* Receive Error Latch */
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uint32_t mdix_mode : 1; /* MDI-X mode reported by auto-negotiation */
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uint32_t reserved : 1; /* Reserved */
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};
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uint32_t val;
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} physts_reg_t;
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#define ETH_PHY_STS_REG_ADDR (0x10)
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/**
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* @brief PHYCR(PHY Control Register)
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*
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*/
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typedef union {
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struct {
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uint32_t phy_addr : 5; /* PHY Address */
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uint32_t led_cfg : 2; /* LED Configuration Modes */
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uint32_t bypass_led_stretching : 1; /* Bypass LED Stretching */
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uint32_t bist_start : 1; /* BIST Start */
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uint32_t bist_status : 1; /* BIST Test Status */
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uint32_t psr_15 : 1; /* BIST Sequence select */
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uint32_t bist_force_error : 1; /* BIST Force Error */
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uint32_t pause_trans_negotiate : 1; /* Pause Transmit Negotiated Status */
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uint32_t pause_receive_negotiat : 1; /* Pause Receive Negotiated Status */
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uint32_t force_mdix : 1; /* Force MDIX */
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uint32_t en_auto_mdix : 1; /* Auto-MDIX Enable */
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};
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uint32_t val;
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} phycr_reg_t;
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#define ETH_PHY_CR_REG_ADDR (0x19)
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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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const char *name;
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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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} phy_dp83848_t;
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static esp_err_t dp83848_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 for dp83848 to null", err);
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phy_dp83848_t *dp83848 = __containerof(phy, phy_dp83848_t, parent);
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dp83848->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 dp83848_get_link(esp_eth_phy_t *phy)
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{
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phy_dp83848_t *dp83848 = __containerof(phy, phy_dp83848_t, parent);
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esp_eth_mediator_t *eth = dp83848->eth;
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bmsr_reg_t bmsr;
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PHY_CHECK(eth->phy_reg_read(eth, dp83848->addr, ETH_PHY_BMSR_REG_ADDR, &(bmsr.val)) == ESP_OK, "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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if (dp83848->link_status != link) {
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if (link == ETH_LINK_UP) {
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phy->negotiate(phy);
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} else {
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PHY_CHECK(eth->on_state_changed(eth, ETH_STATE_LINK, (void *)link) == ESP_OK, "send link event failed", err);
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dp83848->link_status = link;
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}
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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 dp83848_reset(esp_eth_phy_t *phy)
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{
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phy_dp83848_t *dp83848 = __containerof(phy, phy_dp83848_t, parent);
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esp_eth_mediator_t *eth = dp83848->eth;
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bmcr_reg_t bmcr = {.reset = 1};
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PHY_CHECK(eth->phy_reg_write(eth, dp83848->addr, ETH_PHY_BMCR_REG_ADDR, bmcr.val) == ESP_OK, "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 < dp83848->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, dp83848->addr, ETH_PHY_BMCR_REG_ADDR, &(bmcr.val)) == ESP_OK, "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 < dp83848->reset_timeout_ms / 10, "PHY 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 dp83848_negotiate(esp_eth_phy_t *phy)
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{
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phy_dp83848_t *dp83848 = __containerof(phy, phy_dp83848_t, parent);
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esp_eth_mediator_t *eth = dp83848->eth;
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/* Start 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, dp83848->addr, ETH_PHY_BMCR_REG_ADDR, bmcr.val) == ESP_OK, "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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physts_reg_t physts;
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uint32_t to = 0;
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for (to = 0; to < dp83848->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, dp83848->addr, ETH_PHY_BMSR_REG_ADDR, &(bmsr.val)) == ESP_OK, "read BMSR failed", err);
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PHY_CHECK(eth->phy_reg_read(eth, dp83848->addr, ETH_PHY_STS_REG_ADDR, &(physts.val)) == ESP_OK, "read PHYSTS failed", err);
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if (bmsr.auto_nego_complete && physts.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 >= dp83848->autonego_timeout_ms / 10) {
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ESP_LOGW(TAG, "Ethernet PHY auto negotiation timeout");
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}
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/* Updata information about link, speed, duplex */
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PHY_CHECK(eth->phy_reg_read(eth, dp83848->addr, ETH_PHY_BMSR_REG_ADDR, &(bmsr.val)) == ESP_OK, "read BMSR failed", err);
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PHY_CHECK(eth->phy_reg_read(eth, dp83848->addr, ETH_PHY_STS_REG_ADDR, &(physts.val)) == ESP_OK, "read PHYSTS failed", err);
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eth_link_t link = bmsr.link_status ? ETH_LINK_UP : ETH_LINK_DOWN;
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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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if (physts.speed_status) {
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speed = ETH_SPEED_10M;
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} else {
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speed = ETH_SPEED_100M;
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}
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if (physts.duplex_status) {
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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, "send speed event failed", err);
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PHY_CHECK(eth->on_state_changed(eth, ETH_STATE_DUPLEX, (void *)duplex) == ESP_OK, "send duplex event failed", err);
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if (dp83848->link_status != link) {
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PHY_CHECK(eth->on_state_changed(eth, ETH_STATE_LINK, (void *)link) == ESP_OK, "send link event failed", err);
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dp83848->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 dp83848_pwrctl(esp_eth_phy_t *phy, bool enable)
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{
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phy_dp83848_t *dp83848 = __containerof(phy, phy_dp83848_t, parent);
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esp_eth_mediator_t *eth = dp83848->eth;
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bmcr_reg_t bmcr;
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PHY_CHECK(eth->phy_reg_read(eth, dp83848->addr, ETH_PHY_BMCR_REG_ADDR, &(bmcr.val)) == ESP_OK, "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, dp83848->addr, ETH_PHY_BMCR_REG_ADDR, bmcr.val) == ESP_OK, "write BMCR failed", err);
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PHY_CHECK(eth->phy_reg_read(eth, dp83848->addr, ETH_PHY_BMCR_REG_ADDR, &(bmcr.val)) == ESP_OK, "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 dp83848_set_addr(esp_eth_phy_t *phy, uint32_t addr)
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{
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phy_dp83848_t *dp83848 = __containerof(phy, phy_dp83848_t, parent);
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dp83848->addr = addr;
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return ESP_OK;
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}
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static esp_err_t dp83848_get_addr(esp_eth_phy_t *phy, uint32_t *addr)
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{
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PHY_CHECK(addr, "get phy address failed", err);
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phy_dp83848_t *dp83848 = __containerof(phy, phy_dp83848_t, parent);
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*addr = dp83848->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 dp83848_del(esp_eth_phy_t *phy)
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{
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phy_dp83848_t *dp83848 = __containerof(phy, phy_dp83848_t, parent);
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free(dp83848);
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return ESP_OK;
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}
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static esp_err_t dp83848_init(esp_eth_phy_t *phy)
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{
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phy_dp83848_t *dp83848 = __containerof(phy, phy_dp83848_t, parent);
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esp_eth_mediator_t *eth = dp83848->eth;
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/* Power on Ethernet PHY */
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PHY_CHECK(dp83848_pwrctl(phy, true) == ESP_OK, "power on Ethernet PHY failed", err);
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/* Reset Ethernet PHY */
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PHY_CHECK(dp83848_reset(phy) == ESP_OK, "reset Ethernet PHY 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, dp83848->addr, ETH_PHY_IDR1_REG_ADDR, &(id1.val)) == ESP_OK, "read ID1 failed", err);
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PHY_CHECK(eth->phy_reg_read(eth, dp83848->addr, ETH_PHY_IDR2_REG_ADDR, &(id2.val)) == ESP_OK, "read ID2 failed", err);
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PHY_CHECK(id1.oui_msb == 0x2000 && id2.oui_lsb == 0x17 && id2.vendor_model == 0x09, "wrong PHY 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 dp83848_deinit(esp_eth_phy_t *phy)
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{
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/* Power off Ethernet PHY */
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PHY_CHECK(dp83848_pwrctl(phy, false) == ESP_OK, "power off Ethernet PHY 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_dp83848(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_dp83848_t *dp83848 = calloc(1, sizeof(phy_dp83848_t));
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PHY_CHECK(dp83848, "calloc dp83848 object failed", err);
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dp83848->name = "dp83848";
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dp83848->addr = config->phy_addr;
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dp83848->reset_timeout_ms = config->reset_timeout_ms;
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dp83848->link_status = ETH_LINK_DOWN;
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dp83848->autonego_timeout_ms = config->autonego_timeout_ms;
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dp83848->parent.reset = dp83848_reset;
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dp83848->parent.init = dp83848_init;
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dp83848->parent.deinit = dp83848_deinit;
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dp83848->parent.set_mediator = dp83848_set_mediator;
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dp83848->parent.negotiate = dp83848_negotiate;
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dp83848->parent.get_link = dp83848_get_link;
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dp83848->parent.pwrctl = dp83848_pwrctl;
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dp83848->parent.get_addr = dp83848_get_addr;
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dp83848->parent.set_addr = dp83848_set_addr;
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dp83848->parent.del = dp83848_del;
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return &(dp83848->parent);
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err:
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return NULL;
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}
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