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esp-idf/components/ethernet/emac_main.c

767 wiersze
19 KiB
C
Czysty Wina Historia

// 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/dport_reg.h"
#include "soc/emac_ex_reg.h"
#include "soc/emac_reg_v2.h"
#include "soc/soc.h"
#include "tcpip_adapter.h"
#include "sdkconfig.h"
#include "esp_task_wdt.h"
#include "esp_event.h"
#include "esp_system.h"
#include "esp_err.h"
#include "esp_log.h"
#include "esp_eth.h"
#include "esp_intr_alloc.h"
#include "emac_common.h"
#include "emac_desc.h"
#include "freertos/xtensa_api.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/queue.h"
#include "freertos/semphr.h"
#include "freertos/timers.h"
#define EMAC_EVT_QNUM 200
#define EMAC_SIG_MAX 50
static struct emac_config_data emac_config;
static uint8_t emac_dma_rx_chain_buf[32 * DMA_RX_BUF_NUM];
static uint8_t emac_dma_tx_chain_buf[32 * DMA_TX_BUF_NUM];
static uint8_t emac_dma_rx_buf[DMA_RX_BUF_SIZE * DMA_RX_BUF_NUM];
static uint8_t emac_dma_tx_buf[DMA_TX_BUF_SIZE * DMA_TX_BUF_NUM];
static SemaphoreHandle_t emac_g_sem;
static portMUX_TYPE g_emac_mux = portMUX_INITIALIZER_UNLOCKED;
static xTaskHandle emac_task_hdl;
static xQueueHandle emac_xqueue;
static uint8_t emac_sig_cnt[EMAC_SIG_MAX] = {0};
static TimerHandle_t emac_timer = NULL;
static const char *TAG = "emac";
static esp_err_t emac_ioctl(emac_sig_t sig, emac_par_t par);
esp_err_t emac_post(emac_sig_t sig, emac_par_t par);
static void emac_macaddr_init(void)
{
esp_efuse_read_mac(&(emac_config.macaddr[0]));
emac_config.macaddr[5] = emac_config.macaddr[5] + 3;
}
void esp_eth_get_mac(uint8_t mac[6])
{
memcpy(mac, &(emac_config.macaddr[0]), 6);
}
static void emac_setup_tx_desc(struct dma_extended_desc *tx_desc , uint32_t size)
{
tx_desc->basic.desc0 = EMAC_DESC_TX_OWN | EMAC_DESC_INT_COMPL | EMAC_DESC_LAST_SEGMENT | EMAC_DESC_FIRST_SEGMENT | EMAC_DESC_SECOND_ADDR_CHAIN;
tx_desc->basic.desc1 = size & 0xfff;
}
static void emac_clean_tx_desc(struct dma_extended_desc *tx_desc)
{
tx_desc->basic.desc0 = 0;
tx_desc->basic.desc1 = 0;
}
static void emac_clean_rx_desc(struct dma_extended_desc *rx_desc)
{
rx_desc->basic.desc0 = EMAC_DESC_RX_OWN;
rx_desc->basic.desc1 = EMAC_DESC_RX_SECOND_ADDR_CHAIN | DMA_RX_BUF_SIZE;
}
static void emac_set_tx_base_reg(void)
{
REG_WRITE(EMAC_DMATXBASEADDR_REG, (uint32_t)(emac_config.dma_etx));
}
static void emac_set_rx_base_reg(void)
{
REG_WRITE(EMAC_DMARXBASEADDR_REG, (uint32_t)(emac_config.dma_erx));
}
static void emac_reset_dma_chain(void)
{
emac_config.cnt_tx = 0;
emac_config.cur_tx = 0;
emac_config.dirty_tx = 0;
emac_config.cnt_rx = 0;
emac_config.cur_rx = 0;
emac_config.dirty_rx = 0;
}
static void emac_init_dma_chain(void)
{
int i;
uint32_t dma_phy;
struct dma_extended_desc *p = NULL;
//init tx chain
emac_config.dma_etx = (struct dma_extended_desc *)(&emac_dma_tx_chain_buf[0]);
emac_config.cnt_tx = 0;
emac_config.cur_tx = 0;
emac_config.dirty_tx = 0;
dma_phy = (uint32_t)(emac_config.dma_etx);
p = emac_config.dma_etx;
for (i = 0; i < (DMA_TX_BUF_NUM - 1); i++ ) {
dma_phy += sizeof(struct dma_extended_desc);
emac_clean_tx_desc(p);
p->basic.desc3 = dma_phy;
p->basic.desc2 = (uint32_t)(&emac_dma_tx_buf[0]) + (i * DMA_TX_BUF_SIZE);
p++;
}
p->basic.desc3 = (uint32_t)(emac_config.dma_etx);
p->basic.desc2 = (uint32_t)(&emac_dma_tx_buf[0]) + (i * DMA_TX_BUF_SIZE);
//init desc0 desc1
emac_clean_tx_desc(p);
//init rx chain
emac_config.dma_erx = (struct dma_extended_desc *)(&emac_dma_rx_chain_buf[0]);
emac_config.cnt_rx = 0;
emac_config.cur_rx = 0;
emac_config.dirty_rx = 0;
dma_phy = (uint32_t)(emac_config.dma_erx);
p = emac_config.dma_erx;
for (i = 0; i < (DMA_TX_BUF_NUM - 1); i++ ) {
dma_phy += sizeof(struct dma_extended_desc);
emac_clean_rx_desc(p);
p->basic.desc3 = dma_phy;
p->basic.desc2 = (uint32_t)(&emac_dma_rx_buf[0]) + (i * DMA_RX_BUF_SIZE);
p++;
}
p->basic.desc3 = (uint32_t)(emac_config.dma_erx);
p->basic.desc2 = (uint32_t)(&emac_dma_rx_buf[0]) + (i * DMA_RX_BUF_SIZE);
//init desc0 desc1
emac_clean_rx_desc(p);
}
void esp_eth_smi_write(uint32_t reg_num, uint16_t value)
{
uint32_t phy_num = emac_config.phy_addr;
while (REG_GET_BIT(EMAC_GMACGMIIADDR_REG, EMAC_GMIIBUSY) == 1 ) {
}
REG_WRITE(EMAC_GMACGMIIDATA_REG, value);
REG_WRITE(EMAC_GMACGMIIADDR_REG, 0x3 | ((reg_num & 0x1f) << 6) | ((phy_num & 0x1f) << 11) | ((0x3) << 2));
while (REG_GET_BIT(EMAC_GMACGMIIADDR_REG, EMAC_GMIIBUSY) == 1 ) {
}
}
uint16_t esp_eth_smi_read(uint32_t reg_num)
{
uint32_t phy_num = emac_config.phy_addr;
uint16_t value = 0;
while (REG_GET_BIT(EMAC_GMACGMIIADDR_REG, EMAC_GMIIBUSY) == 1 ) {
}
REG_WRITE(EMAC_GMACGMIIADDR_REG, 0x1 | ((reg_num & 0x1f) << 6) | ((phy_num & 0x1f) << 11) | (0x3 << 2));
while (REG_GET_BIT(EMAC_GMACGMIIADDR_REG, EMAC_GMIIBUSY) == 1 ) {
}
value = (REG_READ(EMAC_GMACGMIIDATA_REG) & 0xffff);
return value;
}
static void emac_set_user_config_data(eth_config_t *config )
{
emac_config.phy_addr = config->phy_addr;
emac_config.mac_mode = config->mac_mode;
emac_config.phy_init = config->phy_init;
emac_config.emac_tcpip_input = config->tcpip_input;
emac_config.emac_gpio_config = config->gpio_config;
}
static esp_err_t emac_verify_args(void)
{
esp_err_t ret = ESP_OK;
if (emac_config.phy_addr > 31) {
ESP_LOGE(TAG, "phy addr err");
ret = ESP_FAIL;
}
if (emac_config.mac_mode != EMAC_MODE_RMII) {
ESP_LOGE(TAG, "mac mode err,now only support RMII");
ret = ESP_FAIL;
}
if (emac_config.phy_init == NULL) {
ESP_LOGE(TAG, "phy_init func is null");
ret = ESP_FAIL;
}
if (emac_config.emac_tcpip_input == NULL) {
ESP_LOGE(TAG, "tcpip_input func is null");
ret = ESP_FAIL;
}
if (emac_config.emac_gpio_config == NULL) {
ESP_LOGE(TAG, "gpio config func is null");
ret = ESP_FAIL;
}
return ret;
}
//TODO for mac filter
void emac_set_mac_addr(void)
{
}
//TODO
void emac_check_mac_addr(void)
{
}
static void emac_process_tx(void)
{
uint32_t cur_tx_desc = emac_read_tx_cur_reg();
while (((uint32_t) & (emac_config.dma_etx[emac_config.dirty_tx].basic.desc0) != cur_tx_desc)) {
emac_clean_tx_desc(&(emac_config.dma_etx[emac_config.dirty_tx]));
emac_config.dirty_tx = (emac_config.dirty_tx + 1) % DMA_TX_BUF_NUM;
emac_config.cnt_tx --;
if (emac_config.cnt_tx < 0) {
ESP_LOGE(TAG, "emac tx chain err");
}
}
}
static void emac_process_rx(void)
{
uint32_t cur_rx_desc = emac_read_rx_cur_reg();
while (((uint32_t) & (emac_config.dma_erx[emac_config.dirty_rx].basic.desc0) != cur_rx_desc)) {
//copy data to lwip
emac_config.emac_tcpip_input((void *)(emac_config.dma_erx[emac_config.dirty_rx].basic.desc2),
(((emac_config.dma_erx[emac_config.dirty_rx].basic.desc0) >> EMAC_DESC_FRAME_LENGTH_S) & EMAC_DESC_FRAME_LENGTH) , NULL);
emac_clean_rx_desc(&(emac_config.dma_erx[emac_config.dirty_rx]));
emac_config.dirty_rx = (emac_config.dirty_rx + 1) % DMA_RX_BUF_NUM;
if (emac_config.rx_need_poll != 0) {
emac_poll_rx_cmd();
emac_config.rx_need_poll = 0;
}
//if open this ,one intr can do many intrs ?
//cur_rx_desc = emac_read_rx_cur_reg();
}
}
//TODO other events need to do something
static void IRAM_ATTR emac_process_intr(void *arg)
{
uint32_t event;
event = REG_READ(EMAC_DMASTATUS_REG);
//clr intrs
REG_WRITE(EMAC_DMASTATUS_REG, event);
if (event & EMAC_RECV_BUF_UNAVAIL) {
emac_config.rx_need_poll = 1;
} else if (event & EMAC_TRANS_INT) {
emac_post(SIG_EMAC_TX_DONE, 0);
} else if (event & EMAC_RECV_INT) {
emac_post(SIG_EMAC_RX_DONE, 0);
} else {
//other events
}
}
//ToDo: this should only be called once because this allocates the interrupt as well.
static void emac_enable_intr()
{
//init emac intr
esp_intr_alloc(ETS_ETH_MAC_INTR_SOURCE, 0, emac_process_intr, NULL, NULL);
REG_WRITE(EMAC_DMAINTERRUPT_EN_REG, EMAC_INTR_ENABLE_BIT);
}
static void emac_disable_intr()
{
REG_WRITE(EMAC_DMAINTERRUPT_EN_REG, 0);
}
static bool emac_check_phy_link_status(void)
{
return ((esp_eth_smi_read(1) & 0x4) == 0x4 );
}
static void emac_process_link_updown(bool link_status)
{
system_event_t evt;
emac_config.phy_link_up = link_status;
if (link_status == true) {
ESP_LOGI(TAG, "eth link_up!!!");
emac_enable_dma_tx();
emac_enable_dma_rx();
ets_delay_us(200000);
evt.event_id = SYSTEM_EVENT_ETH_CONNECTED;
} else {
ESP_LOGI(TAG, "eth link_down!!!");
emac_disable_dma_tx();
emac_disable_dma_rx();
evt.event_id = SYSTEM_EVENT_ETH_DISCONNECTED;
}
esp_event_send(&evt);
}
static void emac_hw_init(void)
{
//init chain
emac_init_dma_chain();
//get hw features TODO
//ipc TODO
}
static esp_err_t emac_xmit(void *param)
{
struct emac_post_cmd *post_cmd = (struct emac_post_cmd *)param;
struct emac_tx_cmd *cmd = (struct emac_tx_cmd *)(post_cmd->cmd);
esp_err_t ret = ESP_OK;
void *buf = cmd->buf;
uint16_t size = cmd->size;
if (emac_config.emac_status != EMAC_RUNTIME_START || emac_config.emac_status == EMAC_RUNTIME_NOT_INIT) {
ESP_LOGI(TAG, "tx netif close");
cmd->err = ERR_IF;
ret = ESP_FAIL;
goto _exit;
}
if (emac_config.cnt_tx == DMA_TX_BUF_NUM) {
ESP_LOGI(TAG, "tx buf full");
cmd->err = ERR_MEM;
ret = ESP_FAIL;
goto _exit;
}
memcpy((uint8_t *)(emac_config.dma_etx[emac_config.cur_tx].basic.desc2), (uint8_t *)buf, size);
emac_setup_tx_desc(&(emac_config.dma_etx[emac_config.cur_tx]), size);
emac_config.cnt_tx ++;
emac_config.cur_tx = (emac_config.cur_tx + 1) % DMA_TX_BUF_NUM ;
emac_poll_tx_cmd();
_exit:
if (post_cmd->post_type == EMAC_POST_SYNC) {
xSemaphoreGive(emac_g_sem);
}
return ret;
}
static void emac_init_default_data(void)
{
emac_config.rx_need_poll = 0;
}
void emac_link_check_func(void *pv_parameters)
{
if (emac_config.emac_status != EMAC_RUNTIME_START ||
emac_config.emac_status == EMAC_RUNTIME_NOT_INIT) {
return;
}
if (emac_check_phy_link_status() == true ) {
if (emac_config.phy_link_up == false) {
emac_process_link_updown(true);
}
} else {
if (emac_config.phy_link_up == true) {
emac_process_link_updown(false);
}
}
}
static bool emac_link_check_timer_init(void)
{
emac_timer = xTimerCreate("emac_timer", (1000 / portTICK_RATE_MS),
pdTRUE, (void *)rand(), emac_link_check_func);
if (emac_timer == NULL) {
return false;
} else {
return true;
}
}
static bool emac_link_check_timer_start(void)
{
if (xTimerStart(emac_timer, portMAX_DELAY) != pdPASS) {
return false;
} else {
return true;
}
}
static bool emac_link_check_timer_stop(void)
{
if (xTimerStop(emac_timer, portMAX_DELAY) != pdPASS) {
return false;
} else {
return true;
}
}
static bool emac_link_check_timer_delete(void)
{
xTimerDelete(emac_timer, portMAX_DELAY);
emac_timer = NULL;
return true;
}
static void emac_start(void *param)
{
struct emac_post_cmd *post_cmd = (struct emac_post_cmd *)param;
struct emac_open_cmd *cmd = (struct emac_open_cmd *)(post_cmd->cmd);
ESP_LOGI(TAG , "emac start !!!\n");
cmd->err = EMAC_CMD_OK;
emac_enable_clk(true);
emac_macaddr_init();
emac_check_mac_addr();
emac_set_mac_addr();
emac_set_tx_base_reg();
emac_set_rx_base_reg();
emac_mac_init();
emac_config.phy_init();
//for test
//emac_wait_linkup();
//mmc not support
//ptp TODO
//enable emac intr
emac_enable_intr();
emac_config.emac_status = EMAC_RUNTIME_START;
system_event_t evt;
evt.event_id = SYSTEM_EVENT_ETH_START;
esp_event_send(&evt);
//set a timer to check link up status
if (emac_link_check_timer_init() == true) {
if (emac_link_check_timer_start() != true) {
cmd->err = EMAC_CMD_FAIL;
emac_link_check_timer_delete();
}
} else {
cmd->err = EMAC_CMD_FAIL;
}
if (post_cmd->post_type == EMAC_POST_SYNC) {
xSemaphoreGive(emac_g_sem);
}
ESP_LOGI(TAG, "emac start success !!!");
}
esp_err_t esp_eth_enable(void)
{
struct emac_post_cmd post_cmd;
struct emac_open_cmd open_cmd;
post_cmd.cmd = (void *)(&open_cmd);
open_cmd.err = EMAC_CMD_OK;
if (emac_config.emac_status == EMAC_RUNTIME_START) {
open_cmd.err = EMAC_CMD_OK;
return open_cmd.err;
}
if (emac_config.emac_status != EMAC_RUNTIME_NOT_INIT) {
if (emac_ioctl(SIG_EMAC_START, (emac_par_t)(&post_cmd)) != 0) {
open_cmd.err = EMAC_CMD_FAIL;
}
} else {
open_cmd.err = EMAC_CMD_FAIL;
}
return open_cmd.err;
}
static void emac_stop(void *param)
{
struct emac_post_cmd *post_cmd = (struct emac_post_cmd *)param;
ESP_LOGI(TAG, "emac stop");
emac_link_check_timer_stop();
emac_link_check_timer_delete();
emac_process_link_updown(false);
emac_disable_intr();
emac_reset_dma_chain();
emac_reset();
emac_enable_clk(false);
emac_config.emac_status = EMAC_RUNTIME_STOP;
system_event_t evt;
evt.event_id = SYSTEM_EVENT_ETH_STOP;
esp_event_send(&evt);
if (post_cmd->post_type == EMAC_POST_SYNC) {
xSemaphoreGive(emac_g_sem);
}
ESP_LOGI(TAG, "emac stop success !!!");
}
esp_err_t esp_eth_disable(void)
{
struct emac_post_cmd post_cmd;
struct emac_close_cmd close_cmd;
post_cmd.cmd = (void *)(&close_cmd);
close_cmd.err = EMAC_CMD_OK;
if (emac_config.emac_status == EMAC_RUNTIME_STOP) {
close_cmd.err = EMAC_CMD_OK;
return close_cmd.err;
}
if (emac_config.emac_status != EMAC_RUNTIME_NOT_INIT) {
if (emac_ioctl(SIG_EMAC_STOP, (emac_par_t)(&post_cmd)) != 0) {
close_cmd.err = EMAC_CMD_FAIL;
}
} else {
close_cmd.err = EMAC_CMD_FAIL;
}
return close_cmd.err;
}
static esp_err_t emac_ioctl(emac_sig_t sig, emac_par_t par)
{
esp_err_t ret = ESP_OK;
struct emac_post_cmd *post_cmd = (struct emac_post_cmd *)par;
xTaskHandle task_hdl = xTaskGetCurrentTaskHandle();
if (emac_task_hdl != task_hdl) {
post_cmd->post_type = EMAC_POST_SYNC;
if (emac_post(sig, par) != ESP_OK) {
ret = ESP_FAIL;
return ret;
};
if (xSemaphoreTake(emac_g_sem, portMAX_DELAY) == pdTRUE) {
return ret;
}
} else {
post_cmd->post_type = EMAC_POST_ASYNC;
switch (sig) {
case SIG_EMAC_RX_DONE:
emac_process_rx();
break;
case SIG_EMAC_TX_DONE:
emac_process_tx();
break;
case SIG_EMAC_TX:
emac_xmit((void *)par);
break;
case SIG_EMAC_START:
emac_start((void *)par);
break;
case SIG_EMAC_STOP:
emac_stop((void *)par);
break;
default:
ESP_LOGE(TAG, "unexpect sig %d", sig);
break;
}
}
return ret;
}
esp_err_t esp_eth_tx(uint8_t *buf, uint16_t size)
{
struct emac_post_cmd post_cmd;
struct emac_tx_cmd tx_cmd;
post_cmd.cmd = (void *)(&tx_cmd);
if (emac_check_phy_link_status() == false) {
emac_process_link_updown(false);
tx_cmd.err = ERR_IF;
} else {
tx_cmd.buf = buf;
tx_cmd.size = size;
tx_cmd.err = ERR_OK;
if (emac_ioctl(SIG_EMAC_TX, (emac_par_t)(&post_cmd)) != 0) {
tx_cmd.err = ERR_MEM;
}
}
return tx_cmd.err;
}
void emac_task(void *pv)
{
emac_event_t e;
for (;;) {
if (xQueueReceive(emac_xqueue, &e, (portTickType)portMAX_DELAY) == pdTRUE) {
portENTER_CRITICAL(&g_emac_mux);
emac_sig_cnt[e.sig]--;
portEXIT_CRITICAL(&g_emac_mux);
switch (e.sig) {
case SIG_EMAC_RX_DONE:
emac_process_rx();
break;
case SIG_EMAC_TX_DONE:
emac_process_tx();
break;
case SIG_EMAC_TX:
emac_xmit((void *)e.par);
break;
case SIG_EMAC_START:
emac_start((void *)e.par);
break;
case SIG_EMAC_STOP:
emac_stop((void *)e.par);
break;
default:
ESP_LOGE(TAG, "unexpect sig %d", e.sig);
break;
}
}
}
}
esp_err_t IRAM_ATTR emac_post(emac_sig_t sig, emac_par_t par)
{
portENTER_CRITICAL(&g_emac_mux);
if (emac_sig_cnt[sig] && sig != SIG_EMAC_TX) {
portEXIT_CRITICAL(&g_emac_mux);
return ESP_OK;
} else {
emac_sig_cnt[sig]++;
portEXIT_CRITICAL(&g_emac_mux);
emac_event_t evt;
evt.sig = sig;
evt.par = par;
if (sig <= SIG_EMAC_RX_DONE) {
portBASE_TYPE tmp;
if (xQueueSendFromISR(emac_xqueue, &evt, &tmp) != pdPASS) {
return ESP_FAIL;
}
} else {
if (xQueueSend(emac_xqueue, &evt, 10 / portTICK_RATE_MS) != pdTRUE) {
return ESP_FAIL;
}
}
}
return ESP_OK;
}
esp_err_t esp_eth_init(eth_config_t *config)
{
esp_err_t ret = ESP_OK;
#if !CONFIG_ETHERNET
ESP_LOGI(TAG, "eth driver init fail,please make menuconfig and enable ethernet .");
ret = ESP_FAIL;
goto _exit;
#endif
emac_init_default_data();
if (config != NULL ) {
emac_set_user_config_data(config);
}
ret = emac_verify_args();
if (ret != ESP_OK) {
goto _exit;
}
//before set emac reg must enable clk
emac_enable_clk(true);
REG_SET_FIELD(EMAC_EX_PHYINF_CONF_REG, EMAC_EX_PHY_INTF_SEL, EMAC_EX_PHY_INTF_RMII);
emac_dma_init();
if (emac_config.mac_mode == EMAC_MODE_RMII) {
emac_set_clk_rmii();
} else {
emac_set_clk_mii();
}
emac_config.emac_gpio_config();
ESP_LOGI(TAG, "mac version %04xa", emac_read_mac_version());
emac_hw_init();
//watchdog TODO
//init task for emac
emac_g_sem = xSemaphoreCreateBinary();
emac_xqueue = xQueueCreate(EMAC_EVT_QNUM, sizeof(emac_event_t));
xTaskCreate(emac_task, "emacT", 2048 * 4, NULL, (19), &emac_task_hdl);
emac_reset();
emac_enable_clk(false);
emac_config.emac_status = EMAC_RUNTIME_INIT;
_exit:
return ret;
}
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