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Add PHY register writes to enable external clock on Ethernet with RTL8201 (#6704) 

Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
This commit is contained in:
Nate Clark 2024-05-08 20:47:25 -04:00 committed by GitHub
parent 72481006e4
commit 819be76013
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GPG Key ID: B5690EEEBB952194
2 changed files with 46 additions and 0 deletions
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44
esphome/components/ethernet/ethernet_component.cpp
View File

@ -184,6 +184,10 @@ void EthernetComponent::setup() {
// KSZ8081RNA default is incorrect. It expects a 25MHz clock instead of the 50MHz we provide.
this->ksz8081_set_clock_reference_(mac);
}
if (this->type_ == ETHERNET_TYPE_RTL8201 && this->clk_mode_ == EMAC_CLK_EXT_IN) {
// Change in default behavior of RTL8201FI may require register setting to enable external clock
this->rtl8201_set_rmii_mode_(mac);
}
#endif
// use ESP internal eth mac
@ -583,6 +587,46 @@ void EthernetComponent::ksz8081_set_clock_reference_(esp_eth_mac_t *mac) {
ESP_LOGVV(TAG, "KSZ8081 PHY Control 2: %s", format_hex_pretty((u_int8_t *) &phy_control_2, 2).c_str());
}
}
constexpr uint8_t RTL8201_RMSR_REG_ADDR = 0x10;
void EthernetComponent::rtl8201_set_rmii_mode_(esp_eth_mac_t *mac) {
esp_err_t err;
uint32_t phy_rmii_mode;
err = mac->write_phy_reg(mac, this->phy_addr_, 0x1f, 0x07);
ESPHL_ERROR_CHECK(err, "Setting Page 7 failed");
/*
* RTL8201 RMII Mode Setting Register (RMSR)
* Page 7 Register 16
*
* bit 0 Reserved 0
* bit 1 Rg_rmii_rxdsel 1 (default)
* bit 2 Rg_rmii_rxdv_sel: 0 (default)
* bit 3 RMII Mode: 1 (RMII Mode)
* bit 4~7 Rg_rmii_rx_offset: 1111 (default)
* bit 8~11 Rg_rmii_tx_offset: 1111 (default)
* bit 12 Rg_rmii_clkdir: 1 (Input)
* bit 13~15 Reserved 000
*
* Binary: 0001 1111 1111 1010
* Hex: 0x1FFA
*
*/
err = mac->read_phy_reg(mac, this->phy_addr_, RTL8201_RMSR_REG_ADDR, &(phy_rmii_mode));
ESPHL_ERROR_CHECK(err, "Read PHY RMSR Register failed");
ESP_LOGV(TAG, "Hardware default RTL8201 RMII Mode Register is: 0x%04X", phy_rmii_mode);
err = mac->write_phy_reg(mac, this->phy_addr_, RTL8201_RMSR_REG_ADDR, 0x1FFA);
ESPHL_ERROR_CHECK(err, "Setting Register 16 RMII Mode Setting failed");
err = mac->read_phy_reg(mac, this->phy_addr_, RTL8201_RMSR_REG_ADDR, &(phy_rmii_mode));
ESPHL_ERROR_CHECK(err, "Read PHY RMSR Register failed");
ESP_LOGV(TAG, "Setting RTL8201 RMII Mode Register to: 0x%04X", phy_rmii_mode);
err = mac->write_phy_reg(mac, this->phy_addr_, 0x1f, 0x0);
ESPHL_ERROR_CHECK(err, "Setting Page 0 failed");
}
#endif
} // namespace ethernet

2
esphome/components/ethernet/ethernet_component.h
View File

@ -86,6 +86,8 @@ class EthernetComponent : public Component {
void dump_connect_params_();
/// @brief Set `RMII Reference Clock Select` bit for KSZ8081.
void ksz8081_set_clock_reference_(esp_eth_mac_t *mac);
/// @brief Set `RMII Mode Setting Register` for RTL8201.
void rtl8201_set_rmii_mode_(esp_eth_mac_t *mac);
std::string use_address_;
#ifdef USE_ETHERNET_SPI