网卡驱动
信息搜集
中断
# ifconfig
eth0 Link encap:Ethernet HWaddr 02:81:E6:56:D9:1F
inet addr:192.168.31.32 Bcast:192.168.31.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:11666519 errors:0 dropped:5150 overruns:0 frame:0
TX packets:5860150 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:255370485 (243.5 MiB) TX bytes:514635051 (490.7 MiB)
Interrupt:46
# cat /proc/interrupts | grep eth
46: 11835604 0 0 0 GICv2 114 Level eth0
逻辑中断号：46，物理中断号：114
dts
emac: ethernet@1c30000 {
compatible = "allwinner,sun8i-h3-emac";
syscon = <&syscon>;
reg = <0x01c30000 0x10000>;
interrupts = <GIC_SPI 82 IRQ_TYPE_LEVEL_HIGH>; // 114 -32 = 82
interrupt-names = "macirq";
resets = <&ccu RST_BUS_EMAC>;
reset-names = "stmmaceth";
clocks = <&ccu CLK_BUS_EMAC>;
clock-names = "stmmaceth";
status = "disabled";
mdio: mdio {
#address-cells = <1>;
#size-cells = <0>;
compatible = "snps,dwmac-mdio";
};
mdio-mux {
compatible = "allwinner,sun8i-h3-mdio-mux";
#address-cells = <1>;
#size-cells = <0>;
mdio-parent-bus = <&mdio>;
/* Only one MDIO is usable at the time */
internal_mdio: mdio@1 {
compatible = "allwinner,sun8i-h3-mdio-internal";
reg = <1>;
#address-cells = <1>;
#size-cells = <0>;
int_mii_phy: ethernet-phy@1 {
compatible = "ethernet-phy-ieee802.3-c22";
reg = <1>;
clocks = <&ccu CLK_BUS_EPHY>;
resets = <&ccu RST_BUS_EPHY>;
};
};
external_mdio: mdio@2 {
reg = <2>;
#address-cells = <1>;
#size-cells = <0>;
};
};
};
寄存器
# cat /proc/iomem | grep eth
01c30000-01c3ffff : 1c30000.ethernet ethernet@1c30000
寄存器详情
# devmem 0x01c30000 32
0x0000000D // 1101 0000 ：100Mbps，全双工
EPHY
手册中没有相关寄存器介绍 ?? 不过记得前 15 个寄存器是通用的
问题是：如何通过 MDIO 读取呢？
方法：/home/liyongjun/project/board/buildroot/override/OrangePiPC/mdio/mdio.c
# ./mdio.out eth0 0 0
read --- value : 0x3100
# ./mdio.out eth0 0 1
read --- value : 0x79ed
uboot 网络不通问题解决一例1 uboot 下读取 PHY 寄存器
=> mii read 1 0
1000
=> mii read 1 1
1000
=> mii dump 1 0
0. (1000) -- PHY control register --
(8000:0000) 0.15 = 0 reset
(4000:0000) 0.14 = 0 loopback
(2040:0000) 0. 6,13 = b00 speed selection = 10 Mbps
(1000:1000) 0.12 = 1 A/N enable
(0800:0000) 0.11 = 0 power-down
(0400:0000) 0.10 = 0 isolate
(0200:0000) 0. 9 = 0 restart A/N
(0100:0000) 0. 8 = 0 duplex = half
(0080:0000) 0. 7 = 0 collision test enable
(003f:0000) 0. 5- 0 = 0 (reserved)
=> mii dump 1 1
1. (1000) -- PHY status register --
(8000:0000) 1.15 = 0 100BASE-T4 able
(4000:0000) 1.14 = 0 100BASE-X full duplex able
(2000:0000) 1.13 = 0 100BASE-X half duplex able
(1000:1000) 1.12 = 1 10 Mbps full duplex able
(0800:0000) 1.11 = 0 10 Mbps half duplex able
(0400:0000) 1.10 = 0 100BASE-T2 full duplex able
(0200:0000) 1. 9 = 0 100BASE-T2 half duplex able
(0100:0000) 1. 8 = 0 extended status
(0080:0000) 1. 7 = 0 (reserved)
(0040:0000) 1. 6 = 0 MF preamble suppression
(0020:0000) 1. 5 = 0 A/N complete
(0010:0000) 1. 4 = 0 remote fault
(0008:0000) 1. 3 = 0 A/N able
(0004:0000) 1. 2 = 0 link status
(0002:0000) 1. 1 = 0 jabber detect
(0001:0000) 1. 0 = 0 extended capabilities
ethtool
# ethtool eth0
Settings for eth0:
Supported ports: [ TP MII ] // MII
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full // 支持的速率
Supported pause frame use: Symmetric Receive-only
Supports auto-negotiation: Yes // 支持自动协商
Supported FEC modes: Not reported
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Advertised pause frame use: Symmetric Receive-only
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Link partner advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Link partner advertised pause frame use: Symmetric
Link partner advertised auto-negotiation: Yes
Link partner advertised FEC modes: Not reported
Speed: 100Mb/s // 速率
Duplex: Full // 全双工
Auto-negotiation: on // 自动协商：开
Port: MII // 接口：MII
PHYAD: 1 // PHY 地址：1
Transceiver: external
Supports Wake-on: d // 支持唤醒
Wake-on: d
Current message level: 0x0000003f (63)
drv probe link timer ifdown ifup
Link detected: yes // 连接状态