rt-thread-official/bsp/wch/arm/ch579m/board/drv_eth.c

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/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-02-16 Tuber first version
*/
#include <rtthread.h>
#include <rtdevice.h>
#include "board.h"
#include <netif/ethernetif.h>
#include "drv_eth.h"
#ifdef BSP_USING_ETH
static struct eth_device eth_device;
//DMA接收内存区必须4字节对齐
__align(4) UINT8 eth_dma_tx_buf[ETH_BUF_SIZE];
__align(4) UINT8 eth_dma_rx_buf[ETH_BUF_SIZE];
UINT16 eth_rx_len = 0; //接收状态和长度
UINT8 eth_rx_buf[ETH_BUF_SIZE]; //中间缓冲区
UINT8 eth_mac_addr[] = { 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF };
static rt_err_t eth_init(rt_device_t dev)
{
return RT_EOK;
}
static rt_err_t eth_open(rt_device_t dev, rt_uint16_t oflag)
{
return RT_EOK;
}
static rt_err_t eth_close(rt_device_t dev)
{
return RT_EOK;
}
static rt_ssize_t eth_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t size)
{
rt_set_errno(-RT_ENOSYS);
return 0;
}
static rt_ssize_t eth_write(rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t size)
{
rt_set_errno(-RT_ENOSYS);
return 0;
}
static rt_err_t eth_control(rt_device_t dev, int cmd, void *args)
{
switch (cmd)
{
case NIOCTL_GADDR:
/* get mac address */
if (args) rt_memcpy(args, eth_mac_addr, 6);
else return -RT_ERROR;
break;
default :
break;
}
return RT_EOK;
}
rt_err_t eth_tx(rt_device_t dev, struct pbuf *p)
{
//判断eth是否处于发送状态
if ((R8_ETH_ECON1 & RB_ETH_ECON1_TXRTS) != 0x00)
{
return ERR_INPROGRESS;
}
//确定缓冲区是否足够
if (p->tot_len > sizeof(eth_dma_tx_buf))
{
return ERR_MEM;
}
//拷贝数据到dma缓冲区
rt_memcpy(eth_dma_tx_buf, p->payload, p->tot_len);
//设置数据长度
R16_ETH_ETXLN = p->tot_len;
//开始发送
R8_ETH_ECON1 |= RB_ETH_ECON1_TXRTS;
return ERR_OK;
}
struct pbuf *eth_rx(rt_device_t dev)
{
struct pbuf *p = NULL;
//检查是否有数据
if (eth_rx_len == 0)
{
return NULL;
}
p = pbuf_alloc(PBUF_RAW, eth_rx_len, PBUF_POOL);
if (p == NULL)
{
rt_kprintf("eth_rx: pbuf_alloc failed\n");
eth_rx_len = 0;
return NULL;
}
//拷贝数据到pbuf
rt_memcpy((uint8_t *)((uint8_t *)p->payload), (uint8_t *)((uint8_t *)eth_rx_buf), eth_rx_len);
//恢复状态
eth_rx_len = 0;
return p;
}
int read_eth_link_status()
{
R8_ETH_MIREGADR = 0x01;//状态寄存器
R8_ETH_MISTAT |= 0x00; //读MII寄存器
//获取link状态
if ((R16_ETH_MIRD & 0x04) != 0)
{
return 1; //已插入
}
return 0;
}
void ETH_IRQHandler(void) /* 以太网中断 */
{
rt_interrupt_enter();
//接收到数据包
if ((R8_ETH_EIR & RB_ETH_EIR_RXIF) != 0)
{
//判断缓存区是否有数据
if (eth_rx_len == 0)
{
rt_memcpy(eth_rx_buf, eth_dma_rx_buf, R16_ETH_ERXLN);
eth_rx_len = R16_ETH_ERXLN;
//通知拿数据
eth_device_ready(&eth_device);
}
R8_ETH_EIR |= RB_ETH_EIR_RXIF; //清除中断
}
//接收错误
if ((R8_ETH_EIR & RB_ETH_EIE_RXERIE) != 0)
{
R8_ETH_EIR |= RB_ETH_EIE_RXERIE; //清除中断
}
//发送完成
if ((R8_ETH_EIR & RB_ETH_EIR_TXIF) != 0)
{
R8_ETH_EIR |= RB_ETH_EIR_TXIF; //清除中断
}
//发送错误
if ((R8_ETH_EIR & RB_ETH_EIE_TXERIE) != 0)
{
R8_ETH_EIR |= RB_ETH_EIE_TXERIE; //清除中断
}
//Link 变化标志
if ((R8_ETH_EIR & RB_ETH_EIR_LINKIF) != 0)
{
//获取连接状态
if (read_eth_link_status())
{
eth_device_linkchange(&eth_device, RT_TRUE);
rt_kprintf("eth1: link is up\n");
}
else
{
eth_device_linkchange(&eth_device, RT_FALSE);
rt_kprintf("eth1: link is down\n");
}
R8_ETH_EIR |= RB_ETH_EIR_LINKIF; //清除中断
}
rt_interrupt_leave();
}
int rt_hw_eth_init(void)
{
//使能ETH引脚
R16_PIN_ANALOG_IE |= RB_PIN_ETH_IE;
//进入安全访问模式
R8_SAFE_ACCESS_SIG = 0x57;
R8_SAFE_ACCESS_SIG = 0xA8;
//打开以太网时钟
R8_SLP_CLK_OFF1 &= (~RB_SLP_CLK_ETH);
//打开以太网电源
R8_SLP_POWER_CTRL &= (~RB_SLP_ETH_PWR_DN);
//退出安全访问模式
R8_SAFE_ACCESS_SIG = 0x00;
//开启以太网中断
R8_ETH_EIE |= RB_ETH_EIE_INTIE;
//启用以太网接收中断
R8_ETH_EIE |= RB_ETH_EIE_RXIE;
//R8_ETH_EIE |= RB_ETH_EIE_RXERIE;
//启用以太网发送中断
R8_ETH_EIE |= RB_ETH_EIR_TXIF;
R8_ETH_EIE |= RB_ETH_EIR_TXERIF;
//启用Link变化中断
R8_ETH_EIE |= RB_ETH_EIE_LINKIE;
//启用内置的50欧姆阻抗匹配电阻
R8_ETH_EIE |= RB_ETH_EIE_R_EN50;
//配置接收过滤模式
R8_ETH_ERXFCON = RB_ETH_ERXFCON_ANDOR | RB_ETH_ERXFCON_CRCEN;
//设置发送dma
R16_ETH_ETXST = (uint32_t)eth_dma_tx_buf;
//设置接收dma
R16_ETH_ERXST = (uint32_t)eth_dma_rx_buf;
//设置最大接收长度
R16_ETH_MAMXFL = sizeof(eth_dma_rx_buf);
//使能MAC层接收
R8_ETH_MACON1 |= RB_ETH_MACON1_MARXEN;
//开启硬件CRC
R8_ETH_MACON2 |= RB_ETH_MACON2_TXCRCEN;
//所有短包填充0至60字节再4字节 CRC
R8_ETH_MACON2 |= 0x20;
//使能接收
R8_ETH_ECON1 |= RB_ETH_ECON1_RXEN;
//开启中断
NVIC_EnableIRQ(ETH_IRQn);
//设置回调函数
eth_device.parent.init = eth_init;
eth_device.parent.open = eth_open;
eth_device.parent.close = eth_close;
eth_device.parent.read = eth_read;
eth_device.parent.write = eth_write;
eth_device.parent.control = eth_control;
eth_device.parent.user_data = RT_NULL;
eth_device.eth_rx = eth_rx;
eth_device.eth_tx = eth_tx;
return eth_device_init(&(eth_device), "e0");
}
INIT_DEVICE_EXPORT(rt_hw_eth_init);
#endif /* BSP_USING_ETH */