uboot中eth网口实现分析

最新推荐文章于 2024-11-20 18:58:01 发布

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最新推荐文章于 2024-11-20 18:58:01 发布 · 8.5k 阅读

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本文详细介绍了U-Boot中MII命令的使用方法，包括mii命令的语法、功能及注意事项。深入解析了mii命令在初始化网络设备过程中的作用，以及miiread、miiwrite命令的具体实现方式。同时，文章还阐述了在网络初始化过程中的关键步骤，如devname的初始化和网络芯片的初始化流程。

一、uboot mii命令讲解

1.1 mii命令

命令文件路径common/cmd_mii.c

U_BOOT_CMD(
	mii,	5,	1,	do_mii,
	"MII utility commands",
	"device                     - list available devices\n"
	"mii device <devname>           - set current device\n"
	"mii info   <addr>              - display MII PHY info\n"
	"mii read   <addr> <reg>        - read  MII PHY <addr> register <reg>\n"
	"mii write  <addr> <reg> <data> - write MII PHY <addr> register <reg>\n"
	"mii dump   <addr> <reg>        - pretty-print <addr> <reg> (0-5 only)\n"
	"Addr and/or reg may be ranges, e.g. 2-7."
);

注意：在使用mii命令之前应该执行一次ping或者其他的会发生联网动作的命令（如tftp、dhcp）。
打印device

mii device
MII devices: 'mdio0'
Current device: 'mdio0'

打印网络芯片信息

mii info
PHY 0x00: OUI = 0x5043, Model = 0x1D, Rev = 0x01, 1000baseT, FDX
PHY 0x01: OUI = 0x0000, Model = 0x00, Rev = 0x00,  10baseT, HDX
PHY 0x02: OUI = 0x0000, Model = 0x00, Rev = 0x00,  10baseT, HDX
PHY 0x03: OUI = 0x0000, Model = 0x00, Rev = 0x00,  10baseT, HDX
PHY 0x04: OUI = 0x0000, Model = 0x00, Rev = 0x00,  10baseT, HDX
PHY 0x05: OUI = 0x0000, Model = 0x00, Rev = 0x00,  10baseT, HDX
PHY 0x06: OUI = 0x0000, Model = 0x00, Rev = 0x00,  10baseT, HDX
PHY 0x07: OUI = 0x0000, Model = 0x00, Rev = 0x00,  10baseT, HDX
PHY 0x08: OUI = 0x0000, Model = 0x00, Rev = 0x00,  10baseT, HDX
PHY 0x09: OUI = 0x0000, Model = 0x00, Rev = 0x00,  10baseT, HDX
PHY 0x0A: OUI = 0x0000, Model = 0x00, Rev = 0x00,  10baseT, HDX
PHY 0x0B: OUI = 0x0000, Model = 0x00, Rev = 0x00,  10baseT, HDX
PHY 0x0C: OUI = 0x0000, Model = 0x00, Rev = 0x00,  10baseT, HDX
PHY 0x0D: OUI = 0x0000, Model = 0x00, Rev = 0x00,  10baseT, HDX
PHY 0x0E: OUI = 0x0000, Model = 0x00, Rev = 0x00,  10baseT, HDX
PHY 0x0F: OUI = 0x0000, Model = 0x00, Rev = 0x00,  10baseT, HDX
PHY 0x10: OUI = 0x0000, Model = 0x00, Rev = 0x00,  10baseT, HDX
PHY 0x11: OUI = 0x0000, Model = 0x00, Rev = 0x00,  10baseT, HDX
PHY 0x12: OUI