/********************************************************************

 *                   I.MX6 网卡能收不能发

 * 说明：

 *     MAC控制器到PHY之间的阻抗差异。

 *

 *                                 2017-4-28 深圳 龙华樟坑村 曾剑锋

 *******************************************************************/

一、参考文档：

    . Understanding MII Transceiver Status Info

        ftp://ftp.psu.ac.th/pub/scyld/mii-status.html

    . 关于以太网PAUSE的一点研究

        http://www.latelee.org/programming-under-linux/ethernet-pause-frame-study.html

二、U-Boot设定：

setenv bootargs console=ttymxc0, init=/init video=mxcfb0:dev=ldb,bpp= video=mxcfb1:off video=mxcfb2:off video=mxcfb3:off vmalloc=256M androidboot.console=ttymxc0 consoleblank= androidboot.hardware=freescale cma=384M androidboot.selinux=disabled; saveenv; reset;

三、网络设定：

    . 设定ip：

        ifconfig eth0 10.10.10.10 netmask 255.255.255.0

    . 主板抓包工具：

        tcpdump -i eth0 host 10.10.10.10 &

        tcpdump -vv -i eth0 host 10.10.10.10 &

四、ethtool工具：

    . Android 5.1

        root@sabresd_6dq:/ # ethtool eth0

        Settings for eth0:

                Supported ports: [ TP MII ]

                Supported link modes:   10baseT/Half 10baseT/Full

                                        100baseT/Half 100baseT/Full

                                        1000baseT/Full

                Supported pause frame use: Symmetric

                Supports auto-negotiation: Yes

                Advertised link modes:  10baseT/Half 10baseT/Full

                                        100baseT/Half 100baseT/Full

                                        1000baseT/Full

                Advertised pause frame use: Symmetric

                Advertised auto-negotiation: Yes

                Link partner advertised link modes:  100baseT/Half

                Link partner advertised pause frame use: No

                Link partner advertised auto-negotiation: No

                Speed: 100Mb/s

                Duplex: Half

                Port: MII

                PHYAD:

                Transceiver: external

                Auto-negotiation: on

                Supports Wake-on: g

                Wake-on: d

                Link detected: yes

        root@sabresd_6dq:/ # mtp_open

        libphy: .ethernet: - Link is Down

        libphy: .ethernet: - Link is Up - /Full

        root@sabresd_6dq:/ # ethtool eth0

        Settings for eth0:

                Supported ports: [ TP MII ]

                Supported link modes:   10baseT/Half 10baseT/Full

                                        100baseT/Half 100baseT/Full

                                        1000baseT/Full

                Supported pause frame use: Symmetric

                Supports auto-negotiation: Yes

                Advertised link modes:  10baseT/Half 10baseT/Full

                                        100baseT/Half 100baseT/Full

                                        1000baseT/Full

                Advertised pause frame use: Symmetric

                Advertised auto-negotiation: Yes

                Link partner advertised link modes:  10baseT/Half 10baseT/Full

                                                     100baseT/Half 100baseT/Full

                                                     1000baseT/Full

                Link partner advertised pause frame use: Symmetric Receive-only

                Link partner advertised auto-negotiation: Yes

                Speed: 1000Mb/s

                Duplex: Full

                Port: MII

                PHYAD:

                Transceiver: external

                Auto-negotiation: on

                Supports Wake-on: g

                Wake-on: d

                Link detected: yes

        root@sabresd_6dq:/ #                                                           

    . Android 4.2

        root@android:/data # ./ethtool eth0

        Settings for eth0:

                Supported ports: [ TP MII ]

                Supported link modes:   10baseT/Half 10baseT/Full

                                        100baseT/Half 100baseT/Full

                                        1000baseT/Full

                Supported pause frame use: Symmetric

                Supports auto-negotiation: Yes

                Advertised link modes:  10baseT/Half 10baseT/Full

                                        100baseT/Half 100baseT/Full

                                        1000baseT/Full

                Advertised pause frame use: Symmetric

                Advertised auto-negotiation: Yes

                Speed: 1000Mb/s

                Duplex: Full

                Port: MII

                PHYAD:

                Transceiver: external

                Auto-negotiation: on

                Link detected: yes

        root@android:/data # PHY: : - Link is Down

        PHY: : - Link is Up - /Half

        root@android:/data # ./ethtool eth0

        Settings for eth0:

                Supported ports: [ TP MII ]

                Supported link modes:   10baseT/Half 10baseT/Full

                                        100baseT/Half 100baseT/Full

                                        1000baseT/Full

                Supported pause frame use: Symmetric

                Supports auto-negotiation: Yes

                Advertised link modes:  10baseT/Half 10baseT/Full

                                        100baseT/Half 100baseT/Full

                                        1000baseT/Full

                Advertised pause frame use: Symmetric

                Advertised auto-negotiation: Yes

                Speed: 100Mb/s

                Duplex: Half

                Port: MII

                PHYAD:

                Transceiver: external

                Auto-negotiation: on

                Link detected: yes

五、AR8031寄存器值：

    address 0x0 = 0x1000 .

    address 0x1 = 0x796d .

    address 0x2 = 0x4d .

    address 0x3 = 0xd074 .

    address 0x4 = 0x15e1 .

    address 0x5 = 0xcde1 .

    address 0x6 = 0xd .

    address 0x7 = 0x2001 .

    address 0x8 = 0x0 .

    address 0x9 = 0x300 .

    address 0xa = 0x3801 .

    address 0xb = 0x0 .

    address 0xc = 0x0 .

    address 0xf = 0xa000 .

    address 0x10 = 0x862 .

    address 0x11 = 0xbc5c .

    address 0x12 = 0x0 .

    address 0x13 = 0x0 .

    address 0x14 = 0x82c .

    address 0x15 = 0x0 .

    address 0x16 = 0x4e8 .

    address 0x17 = 0x0 .

    address 0x18 = 0x3200 .

    address 0x19 = 0x3000 .

    address 0x1a = 0x0 .

    address 0x1b = 0x63e .

    address 0x1c = 0x0 .

    address 0x1f = 0x8100 .

六、引脚重新配置：

    #define MX6DL_ENET_PAD_CTRL (PAD_CTL_PKE | PAD_CTL_PUE  |               \

                    PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED |               \

                    PAD_CTL_DSE_40ohm   | PAD_CTL_HYS)

    #define PAD_CTL_PKE                     (1 << 12)      1 0000 0000 0000

    #define PAD_CTL_PUE                     (1 << 13)     10 0000 0000 0000

    #define PAD_CTL_PUS_100K_UP             (2 << 14)   1000 0000 0000 0000

    #define PAD_CTL_SPEED_MED               (2 << 6)              1000 0000

    #define PAD_CTL_DSE_40ohm               (6 << 3)                11 0000

    #define PAD_CTL_HYS                     (1 << 8)            1 0000 0000

                                                        b1b0

    #define MX6DL_ENET_REF_CLK_PAD_CTRL     (PAD_CTL_PUE |  \

                    PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED |       \

                    PAD_CTL_DSE_40ohm | PAD_CTL_SRE_FAST)

    #define PAD_CTL_PUE                     (1 << 13)     10 0000 0000 0000

    #define PAD_CTL_PUS_100K_UP             (2 << 14)   1000 0000 0000 0000

    #define PAD_CTL_SPEED_MED               (2 << 6)              1000 0000

    #define PAD_CTL_DSE_40ohm               (6 << 3)                11 0000

    #define PAD_CTL_HYS                     (1 << 8)            1 0000 0000

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