标签:接口 Fix list efault gen The ifconfig pat code
title: 网卡驱动基础知识
date: 2019/12/31 19:51:11
toc: true
---
我们的网卡驱动就是最下面的两层,一个是mac这个一般是soc带的,另一个是phy这个是外挂的,常用的其他形式有几种
1.
soc(带mac和phy) -----差分信号-----RJ45接口网线
2.
soc(带mac,不带phy) -- RGMII/RMII ----phy -----差分信号-----RJ45接口网线
3.
soc(不带mac,不带phy) - mdio接口/spi接口/gpio接口-- mac(带phy) -----差分信号-----RJ45接口网线
|________MDIO/MDCK_________________________|
4.
soc(不带mac,不带phy) - mdio接口/spi接口/gpio接口-- mac(不带phy) ---RGMII/RMII---phy -----差分信号-----RJ45接口网线
|________MDIO/MDCK________________________|
更多其他的接口知识查看01-以太网接口分析.pdf
其实phy是有通用驱动的
修改设备树
&fec1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_enet1>;
phy-mode = "rmii";
phy-reset-gpios = <&gpio1 12 0>; /* GPIO1_12 */
phy-handle = <ðphy0>;
status = "okay";
};
&fec2 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_enet2>;
phy-mode = "rmii";
phy-reset-gpios = <&gpio1 10 0>; /* GPIO1_10 */
phy-handle = <ðphy1>;
status = "okay";
mdio {
#address-cells = <1>;
#size-cells = <0>;
ethphy0: ethernet-phy@5 {
compatible = "ethernet-phy-i00d22.1537";
reg = <5>;
status = "okay";
};/*compatible = "ethernet-phy-i00d22.1537","ethernet-phy-ieee802.3-c22","ethernet-phy-ieee802.3-c45";*/
ethphy1: ethernet-phy@1 {
compatible = "ethernet-phy-id0022.1537";/*compatible = "ethernet-phy-id0022.1537","ethernet-phy-ieee802.3-c22","ethernet-phy-ieee802.3-c45";*/
reg = <1>;
status = "okay";
};
};
};
启动信息如下,下面这个是通用驱动,如果是指定了具体驱动,这里会有显示驱动名字的
ifconfig?eth0?up??
fec?2188000.ethernet?eth0:?Freescale?FEC?PHY?driver?[Generic?PHY]?(mii_bus:phy_addr2188000.ethernet:00,?irq=-1)?
IPv6:?ADDRCONF(NETDEV_UP):?eth0:?link?is?not?ready??
当插上网线提示
libphy:?2188000.ethernet:00?-?Link?is?Up?-?100/Full??
IPv6:?ADDRCONF(NETDEV_CHANGE):?eth0:?link?becomes?ready?
设置ip就可以ping通局域网地址了,或者使用udhpc
,添加网关使用route add default gw 192.168.2.1
我之前ping不通,是由于外接50M晶振,所以无法ping,后面去除了就能ping通
关键文件
关键文件
arch/arm/mach-imx/mach-imx6u.c 这里有对专门的phy的一些fixup
imx.c
drivers/net/phy/mdio_bus.c
当使用通用驱动的时候会调用到这里,可以查看调用关系
drivers/regulator/core.c > _regulator_get 在这里使用dump_stack()
标签:接口 Fix list efault gen The ifconfig pat code
原文地址:https://www.cnblogs.com/zongzi10010/p/12127182.html