OVMS3-idf/components/ethernet/eth_phy/phy_lan8720.c

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// Copyright 2015-2017 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "esp_log.h"
#include "esp_eth.h"
#include "eth_phy/phy_reg.h"
#include "eth_phy/phy_lan8720.h"
#define LAN8720_PHY_ID1 0x0007
#define LAN8720_PHY_ID2 0xc0f0
#define LAN8720_PHY_ID2_MASK 0xFFF0
/* LAN8720-specific registers */
#define PHY_SPECIAL_CONTROL_STATUS_REG (0x1f)
#define AUTO_NEGOTIATION_DONE BIT(12)
#define DUPLEX_INDICATION_FULL BIT(4)
#define SPEED_INDICATION_100T BIT(3)
#define SPEED_INDICATION_10T BIT(2)
#define SPEED_DUPLEX_INDICATION_10T_HALF 0x04
#define SPEED_DUPLEX_INDICATION_10T_FULL 0x14
#define SPEED_DUPLEX_INDICATION_100T_HALF 0x08
#define SPEED_DUPLEX_INDICATION_100T_FULL 0x18
static const char *TAG = "lan8720";
void phy_lan8720_check_phy_init(void)
{
phy_lan8720_dump_registers();
esp_eth_smi_wait_set(MII_BASIC_MODE_STATUS_REG, MII_AUTO_NEGOTIATION_COMPLETE, 0);
esp_eth_smi_wait_set(PHY_SPECIAL_CONTROL_STATUS_REG, AUTO_NEGOTIATION_DONE, 0);
}
eth_speed_mode_t phy_lan8720_get_speed_mode(void)
{
if (esp_eth_smi_read(PHY_SPECIAL_CONTROL_STATUS_REG) & SPEED_INDICATION_100T) {
ESP_LOGD(TAG, "phy_lan8720_get_speed_mode(100)");
return ETH_SPEED_MODE_100M;
} else {
ESP_LOGD(TAG, "phy_lan8720_get_speed_mode(10)");
return ETH_SPEED_MODE_10M;
}
}
eth_duplex_mode_t phy_lan8720_get_duplex_mode(void)
{
if (esp_eth_smi_read(PHY_SPECIAL_CONTROL_STATUS_REG) & DUPLEX_INDICATION_FULL) {
ESP_LOGD(TAG, "phy_lan8720_get_duplex_mode(FULL)");
return ETH_MODE_FULLDUPLEX;
} else {
ESP_LOGD(TAG, "phy_lan8720_get_duplex_mode(HALF)");
return ETH_MODE_HALFDUPLEX;
}
}
void phy_lan8720_power_enable(bool enable)
{
if (enable) {
uint32_t data = esp_eth_smi_read(MII_BASIC_MODE_CONTROL_REG);
data |= MII_AUTO_NEGOTIATION_ENABLE | MII_RESTART_AUTO_NEGOTIATION;
esp_eth_smi_write(MII_BASIC_MODE_CONTROL_REG, data);
// TODO: only enable if config.flow_ctrl_enable == true
phy_mii_enable_flow_ctrl();
}
}
esp_err_t phy_lan8720_init(void)
{
ESP_LOGD(TAG, "phy_lan8720_init()");
phy_lan8720_dump_registers();
esp_eth_smi_write(MII_BASIC_MODE_CONTROL_REG, MII_SOFTWARE_RESET);
esp_err_t res1, res2;
// Call esp_eth_smi_wait_value() with a timeout so it prints an error periodically
res1 = esp_eth_smi_wait_value(MII_PHY_IDENTIFIER_1_REG, LAN8720_PHY_ID1, UINT16_MAX, 1000);
res2 = esp_eth_smi_wait_value(MII_PHY_IDENTIFIER_2_REG, LAN8720_PHY_ID2, LAN8720_PHY_ID2_MASK, 1000);
uint32_t data = esp_eth_smi_read(MII_BASIC_MODE_CONTROL_REG);
data |= MII_AUTO_NEGOTIATION_ENABLE | MII_RESTART_AUTO_NEGOTIATION;
esp_eth_smi_write(MII_BASIC_MODE_CONTROL_REG, data);
ets_delay_us(300);
// TODO: only enable if config.flow_ctrl_enable == true
phy_mii_enable_flow_ctrl();
if (res1 == ESP_OK && res2 == ESP_OK) {
return ESP_OK;
} else {
return ESP_ERR_TIMEOUT;
}
}
const eth_config_t phy_lan8720_default_ethernet_config = {
.phy_addr = 0,
.mac_mode = ETH_MODE_RMII,
.clock_mode = ETH_CLOCK_GPIO0_IN,
.flow_ctrl_enable = true,
.phy_init = phy_lan8720_init,
.phy_check_init = phy_lan8720_check_phy_init,
.phy_power_enable = phy_lan8720_power_enable,
.phy_check_link = phy_mii_check_link_status,
.phy_get_speed_mode = phy_lan8720_get_speed_mode,
.phy_get_duplex_mode = phy_lan8720_get_duplex_mode,
.phy_get_partner_pause_enable = phy_mii_get_partner_pause_enable,
.reset_timeout_ms = 1000,
.promiscuous_enable = false,
};
void phy_lan8720_dump_registers()
{
ESP_LOGD(TAG, "LAN8720 Registers:");
ESP_LOGD(TAG, "BCR 0x%04x", esp_eth_smi_read(0x0));
ESP_LOGD(TAG, "BSR 0x%04x", esp_eth_smi_read(0x1));
ESP_LOGD(TAG, "PHY1 0x%04x", esp_eth_smi_read(0x2));
ESP_LOGD(TAG, "PHY2 0x%04x", esp_eth_smi_read(0x3));
ESP_LOGD(TAG, "ANAR 0x%04x", esp_eth_smi_read(0x4));
ESP_LOGD(TAG, "ANLPAR 0x%04x", esp_eth_smi_read(0x5));
ESP_LOGD(TAG, "ANER 0x%04x", esp_eth_smi_read(0x6));
ESP_LOGD(TAG, "MCSR 0x%04x", esp_eth_smi_read(0x11));
ESP_LOGD(TAG, "SM 0x%04x", esp_eth_smi_read(0x12));
ESP_LOGD(TAG, "SECR 0x%04x", esp_eth_smi_read(0x1A));
ESP_LOGD(TAG, "CSIR 0x%04x", esp_eth_smi_read(0x1B));
ESP_LOGD(TAG, "ISR 0x%04x", esp_eth_smi_read(0x1D));
ESP_LOGD(TAG, "IMR 0x%04x", esp_eth_smi_read(0x1E));
ESP_LOGD(TAG, "PSCSR 0x%04x", esp_eth_smi_read(0x1F));
}