RK3568是怎样使用一条命令实现更新已有的扫描值

本章基于手动/自动调整延时值。但是在实际使用中遇到网络丢包或者获取IP不成功的情况，需要在开机的情况下使用一条命令实现更新已有的扫描值。

注：扫描时不可插网口，不然会出现段错误。

使用命令实现延时值替换
echo 1 > /sys/devices/platform/fe010000.ethernet/phy_rescan
echo 1 > /sys/devices/platform/fe2a0000.ethernet/phy_rescan

命令实现：
1、清除vendor分区里对应tx/rx延时值
2、启动重新扫描功能

内核更改实现功能

.../net/ethernet/stmicro/stmmac/dwmac-rk-tool.c | 54 ++++++++++++++++++++--
1 file changed, 50 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk-tool.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk-tool.c
index 856714b..465d1b5 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk-tool.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk-tool.c
[url=home.php?mod=space&uid=1999721]@@[/url] -1416,6 +1416,44 @@ static ssize_t phy_lb_scan_store(struct device *dev,
}
static DEVICE_ATTR_WO(phy_lb_scan);

+static ssize_t phy_rescan_store(struct device *dev,

• struct device_attribute *attr,
  

• const char *buf, size_t count)
  

+{

• struct net_device *ndev = dev_get_drvdata(dev);
• struct stmmac_priv *priv = netdev_priv(ndev);
• unsigned char delayline[2];
• int vendor_id;
• int ret =0;
• if(!strcmp(priv->dev->name , "lan"))
• vendor_id = ETH0_DELAY_ID;
• else if(!strcmp(priv->dev->name , "wan"))
• vendor_id = ETH1_DELAY_ID;
• memset(delayline, 0x0, sizeof(delayline));
• ret =rk_vendor_read(vendor_id, delayline, 2);
• delayline[0] = 0xff;
• delayline[1] = 0xff;
• if (rk_vendor_write(vendor_id, delayline, 2))
• pr_err("damac rk: write rgmii delayline to vendor failed\n");
• priv->delayline_scanned = false;
• if (!priv->delayline_scanned) {

• if (dwmac_rk_get_rgmii_delayline_from_vendor(priv)){
  

• priv->delayline_scanned = true;
  

• schedule_delayed_work(&priv->scan_dwork, msecs_to_jiffies(8000));
  

• }else{
  

• priv->delayline_scanned = true;
  

• }
  

• }
• return count;
  +}
  +static DEVICE_ATTR_WO(phy_rescan);

int dwmac_rk_create_loopback_sysfs(struct device *device)
{
int ret;
@@ -1436,6 +1474,10 @@ int dwmac_rk_create_loopback_sysfs(struct device *device)
if (ret)
goto remove_phy_lb;

• ret = device_create_file(device, &dev_attr_phy_rescan);
• if (ret)
• goto remove_phy_rescan;
• return 0;

remove_rgmii_delayline:
@@ -1447,6 +1489,9 @@ int dwmac_rk_create_loopback_sysfs(struct device *device)
remove_phy_lb:
device_remove_file(device, &dev_attr_phy_lb);

+remove_phy_rescan:

• device_remove_file(device, &dev_attr_phy_rescan);
• return ret;
  }

@@ -1456,6 +1501,7 @@ int dwmac_rk_remove_loopback_sysfs(struct device *device)
device_remove_file(device, &dev_attr_mac_lb);
device_remove_file(device, &dev_attr_phy_lb);
device_remove_file(device, &dev_attr_phy_lb_scan);

• device_remove_file(device, &dev_attr_phy_rescan);

  return 0;
  }

原作者：Bazinga bingo