esp-idf/components/ethernet/emac_dev.c

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// Copyright 2015-2016 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 <stdio.h>
#include <string.h>
#include "rom/ets_sys.h"
#include "rom/gpio.h"
#include "soc/dport_reg.h"
#include "soc/io_mux_reg.h"
#include "soc/rtc_cntl_reg.h"
#include "soc/gpio_reg.h"
#include "soc/gpio_sig_map.h"
#include "soc/emac_reg_v2.h"
#include "soc/emac_ex_reg.h"
#include "esp_log.h"
#include "driver/gpio.h"
#include "sdkconfig.h"
#include "emac_common.h"
static const char *TAG = "emac";
void emac_poll_tx_cmd(void)
{
//write any to wake up dma
REG_WRITE(EMAC_DMATXPOLLDEMAND_REG, 1);
}
void emac_poll_rx_cmd(void)
{
//write any to wake up dma
REG_WRITE(EMAC_DMARXPOLLDEMAND_REG, 1);
}
void emac_enable_dma_tx(void)
{
REG_SET_BIT(EMAC_DMAOPERATION_MODE_REG, EMAC_START_STOP_TRANSMISSION_COMMAND);
}
void emac_enable_dma_rx(void)
{
REG_SET_BIT(EMAC_DMAOPERATION_MODE_REG, EMAC_START_STOP_RECEIVE);
}
void emac_disable_dma_tx(void)
{
REG_CLR_BIT(EMAC_DMAOPERATION_MODE_REG, EMAC_OPERATE_SECOND_FRAME);
}
void emac_disable_dma_rx(void)
{
REG_CLR_BIT(EMAC_DMAOPERATION_MODE_REG, EMAC_START_STOP_RECEIVE);
}
uint32_t emac_read_tx_cur_reg(void)
{
return REG_READ(EMAC_DMATXCURRDESC_REG);
}
uint32_t emac_read_rx_cur_reg(void)
{
return REG_READ(EMAC_DMARXCURRDESC_REG);
}
uint32_t emac_read_mac_version(void)
{
uint32_t data = 0;
data = REG_READ(EMAC_GMACVERSION_REG);
return data;
}
void emac_reset(void)
{
REG_SET_BIT(EMAC_DMABUSMODE_REG, EMAC_SW_RST);
while (REG_GET_BIT(EMAC_DMABUSMODE_REG, EMAC_SW_RST) == 1) {
//nothing to do ,if stop here,maybe emac have not clk input.
ESP_LOGI(TAG, "emac reseting ....");
}
ESP_LOGI(TAG, "emac reset done");
}
void emac_enable_clk(bool enable)
{
if (enable == true) {
REG_SET_BIT(EMAC_CLK_EN_REG, EMAC_CLK_EN);
} else {
REG_CLR_BIT(EMAC_CLK_EN_REG, EMAC_CLK_EN);
}
}
void emac_set_clk_mii(void)
{
//select ex clock source
REG_SET_BIT(EMAC_EX_CLK_CTRL_REG, EMAC_EX_EXT_OSC_EN);
//ex clk enable
REG_SET_BIT(EMAC_EX_OSCCLK_CONF_REG, EMAC_EX_OSC_CLK_SEL);
//set mii mode rx/tx clk enable
REG_SET_BIT(EMAC_EX_CLK_CTRL_REG, EMAC_EX_MII_CLK_RX_EN);
REG_SET_BIT(EMAC_EX_CLK_CTRL_REG, EMAC_EX_MII_CLK_TX_EN);
}
void emac_dma_init(void)
{
REG_SET_BIT(EMAC_DMAOPERATION_MODE_REG, EMAC_FORWARD_UNDERSIZED_GOOD_FRAMES);
REG_SET_BIT(EMAC_DMAOPERATION_MODE_REG, EMAC_OPERATE_SECOND_FRAME);
REG_SET_FIELD(EMAC_DMABUSMODE_REG, EMAC_PROG_BURST_LEN, 4);
}
void emac_mac_init(void)
{
REG_SET_BIT(EMAC_GMACCONFIG_REG, EMAC_GMACRX);
REG_SET_BIT(EMAC_GMACCONFIG_REG, EMAC_GMACTX);
REG_SET_BIT(EMAC_GMACCONFIG_REG, EMAC_GMACDUPLEX);
REG_SET_BIT(EMAC_GMACCONFIG_REG, EMAC_GMACMIIGMII);
REG_SET_BIT(EMAC_GMACCONFIG_REG, EMAC_GMACFESPEED);
REG_SET_BIT(EMAC_GMACFRAMEFILTER_REG, EMAC_PROMISCUOUS_MODE);
}
void emac_set_clk_rmii(void)
{
//select ex clock source
REG_SET_BIT(EMAC_EX_CLK_CTRL_REG, EMAC_EX_EXT_OSC_EN);
//ex clk enable
REG_SET_BIT(EMAC_EX_OSCCLK_CONF_REG, EMAC_EX_OSC_CLK_SEL);
}